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FHWA/RD-81/061 



I MANUAL FOR XSRAIN - A FORTRAN IV 
u,(AM FOR CALCULATION OF FLOOD 
HYDROGRAPHS FOR UNGAGED WATERSHEDS 



i nu 



July 1981 
Final Report 




"' " : ■""'' WATION 



LIBRARY 





Document is available to the public through 
the National Technical Information Service, 
Springfield, Virginia 22161 



Prepared for 

FEDERAL HIGHWAY ADMINISTRATION 
Offices of Research & Development 
Environmental Division 
Washington, D.C. 20590 



FOREWORD 



This users manual describes how to use the Fortran IV computer program for 
calculating flood hydrographs in basins that have a minimum of hydrologic 
information. The program uses the soil conservation service (SCS) curve 
numbers which account for soil types and land uses but it uses physically 
based infiltration equations, rather than the empirical SCS equations for 
computing excess rainfall. 

Sufficient copies of this report are being distributed to provide a 
minimum two copies to each FHWA regional office, one copy to each division 
office, and one copy to each State highway agency. Direct distribution 
is being made to division offices. 




'Charles F." Scheffey 
Director, Office of Research 
Federal Highway Administration 



NOTICE 

This document is disseminated under the sponsorship of the 
Department of Transportation in the interest of information 
exchange. The United States Government assumes no liability 
for its contents or use thereof. The contents of this report 
reflect the views of the contractor, who is responsible for 
the accuracy of the data presented herein. The contents do 
not necessarily reflect the official views or policy of the 
Department of Transportation. This report does not constitute 
a standard, specification, or regulation. 

The United States Government does not endorse products or 
manufacturers. Trade or manufacturers' names appear herein only 
because they are considered essential to the object of this 
document . 



Technical Report Documentation Page 



1. Report No. 

FHWA/RD- 81/061 



2. Government Accession No. 



3. Recipient's Catalog No. 



4. Title and Subtitle 

USER'S MANUAL for XSRAIN - A FORTRAN IV PROGRAM for 
CALCULATION of FLOOD HYDROGRAPHS for UNGAGED WATER- 
SHEDS 



5. Report Date 

July 1981 



6. Performing Organization Code 



7. Author's) 



8. Performing Organization Report No. 



James P. Verdin and Hubert J. Morel-Seytoux 



9. Performing Organization Name and Address 

Department of Civil Engineering 
Colorado State University 
Fort Collins, Colorado 80523 



10. Work Unit No. (TRAIS) 

FCP 35H2-072 



11. Contract or Grant No. 

DOT-FH-PO-9-3-0015 



13. Type of Report and Period Covered 



12. Sponsoring Agency Name and Address 

Offices of Research and Development 
Federal Highway Administration 
U. S. Department of Transportation 
Washington, D.C. 20590 






DB 



,h7\r 



a^ ,Report , Part 2 



N S P O R r A T > O N 



14 Sponsoring Agenc 



y Code 



15. Supplementary Notes 



FHWA contract manager: D. C. Woo (HRS-42) 



LIBRARY 







16. Abstract 

XSRAIN is a computer program written to calculate flood hydrographs for ungaged 
watersheds by means of the Soil Conservation Service (SCS) runoff index, the curve 
number (CN) . The curve number (CN) for a watershed is determined by the soil and 
land use types occuring within it. XSRAIN does not, however, use SCS equations 
for computing excess rainfall. Abstraction from variable intensity rainfall 
events is accomplished with physically based infiltration equations. The hydraulic 
soil parameters needed to make use of these equations have been calibrated against 
CN, and the computer program makes use of this equivalence. Routing of excess 
rainfall is performed with the SCS dimensionless unit hydrograph (mass curve) to 
produce a runoff hydrograph. Users may input variable intensity storms or they 
may simply specify a depth and duration. In the latter case, one of four possible 
time distributions is imposed at user's option on the rain. Options permit 
accounting for antecedent moisture conditions. Subroutines are described and 
variables defined. Examples of the four main options are provided, as well as 
a hand calculated example. This user's manual is totally self-contained and 
includes all tables and figures needed for the use of XSRAIN. 



17. Key Words 



Runoff 

Ungaged watersheds 

Computer program 

Hydrograph 



18. Distribution Statement 

No restriction. This document is 
available to the public through the 
National Technical Information Service, 
Springfield, Virginia 22161. 



19. Security Clossif. (of this report) 

Unclassified 



20. Security Classif. (of this page) 

Unclassified 



21. No. of Pages 

174 



22. Price 



Form DOT F 1700.7 (8-72) 



Reproduction of completed page authorized 



TABLE OF CONTENTS 

Chapter Page 

I INTRODUCTION 1 

II IMPLEMENTATION . . . . ■ 2 

1. Preliminary Work 2 

1.1 Units Employed in XSRAIN 2 

1.2 Determination of Curve Number 2 

2. Option Summaries 10 

2.1 Main Option One—Imposed Time 
Distribution of Rainfall and Average 

Soil Moisture Conditions 11 

2.2 Main Option Two—Imposed Time 
Distribution of Rainfall and Antecedent 

Soil Moisture Accounting 12 

2.3 Main Option Three— User-Specif ied 
Time Distribution of Rainfall and 

Antecedent Soil Moisture Accounting .... 14 

2.4 Main Option Four— User-Specified 

Time Distribution of Rainfall and Average 

Soil Moisture Conditions 15 

2.5 Suboption 1— Comparison of Hydrographs 
Found with Alternate Means of 

Computing Excess Rainfall 17 

2.6 Suboption 2— Specification of Soil 

Hydraulic Parameters 17 

3. Description of Subroutines 18 

3.1 Subroutine HUFF: Imposition of a 
Time Distribution on a Given Depth 

and Duration of Rainfall 18 

3.2 Subroutine DEFICIT: Revision of 
Moisture Deficit for Season and 

Antecedent Rain 19 

3.3 Subroutine UH: Determination of a 
Unit Hydrograph from the SCS 

Dimensionless Mass Curve 25 

3.4 Subroutine PONTIM: Determination of 

Ponding Time 30 

3.5 Subroutine PPINF: Calculation of Post- 
Ponding Infiltration 32 

3.6 Subroutine ROUTE: Calculation of a 

Flood Hydrograph 35 

3.7 Subroutine CONSTR: Post-Ponding 
Infiltration with Assumed Constant 

Rainfall 36 

3.8 Subroutine SCS: Excess Rainfall by 

the SCS Method 40 

3.9 Subroutine TABLE: Computation of 
Hydraulic Soil Parameters from Curve 

Number 43 

3.10 Subroutine BALANCE: Formation of a 

Corps of Engineers "Balanced Hyetograph" . . 44 



TABLE OF CONTENTS 
(continued) 

Chapter Page 

4. Illustrative Examples 45 

4.1 Main Option One 45 

4.2 Main Option Two . . ,\ 54 

4.3 Main Option Three 65 

4.4 Main Option Four 77 

4.5 Dimensional Limitations of 

XSRAIN 100 

5. Example Calculated by Hand 100 

5.1 Calculation of Time Distribution ...... 100 

5.2 Revision of Storage Suction Factor 102 

5.3 Ponding Time Calculations 103 

5.4 Calculation of Post-Ponding 

Infiltration 104 

5.5 Calculation of a Runoff Hydrograph 106 

III REFERENCES 112 

IV APPENDIX 113 

Reference Al: Methods of Estimation of Time 

of Concentration and Lag Time 114 

Reference A2: Moisture Deficit--CN Regression 

Equation and Other Relations 120 

Figure Al: Relation between Field Capacity 

Moisture Deficit and Curve Number 121 

Table Al : Table of Correspondence 122 

Table A2: Table of Curve Numbers for AMC I 

and AMC III 123 

Table A3: Soil Names and Hydrologic 

Classifications 124 

Exhibit Al: Complete Listing of Program XSRAIN ... 145 



li 



LIST OF FIGURES 

Figure Page 

1 Time distribution of first-quartile storms. 

After Huff (1967) 7 

2 Time distribution of second-quartile storms. 

After Huff (1967) 8 

3 Time distribution of third-quartile storms. 

After Huff (1967) 8 

4 Time distribution of fourth-quartile storms. 

After Huff (1967) 9 

5 A first-quartile, 50 percent probability 

time distribution. After Huff (1967) 9 

6 Example of a discretized version of a Huff 
rainfall time distribution, for the case of 

a storm with the peak occurring in the second 

time quartiie 20 

7 Lysimeter soil moisture variation through time. 
From USDA Technical Bulletin No. 1367 (1967), 
"Evaluation of Agricultural Hydrology by Monolith 
Lysimeters, 1956-62." Seasonal sine curve added 

by authors 21 

8 SCS dimensionless unit hydrograph and 

mass curve (from NEH-4) 26 

9 Discretized version of SCS dimensionless 

mass curve used in subroutine UH 28 

10 Coding sheet showing input data for example 

of Main Option One 48 

11 Coding sheet showing input data for example 

of Main Option Two 56 

12 Coding sheet showing input data for example 

of Main Option Three 69 

13 Coding sheet showing input data for example 

of Main Option Four 80 

14 Infiltration computed in example of 

hand calculations 107 

15 Hydrograph computed in Section 5.5 Ill 

Al Relation between field capacity moisture 

deficit and curve number 121 



in 



LIST OF TABLES 

Table Page 

1 Runoff curve numbers for hydrologic soil-cover 
complexes (antecedent moisture condition II, 

and I = 0.2 S) (from NEH-4, p. 9.2) 4 

3 

2 Runoff curve numbers for selected agricultural, 

suburban and urban land use (antecedent moisture 

condition II and I = 0.2 S) (from SCS Technical 

a 

Release No. 55, p. 2-5) 5 

3 Percentage distribution of quartile 

types. After Huff (1967) . 7 

4 Seasonal rainfall limits for AMC 

(after NEH-4) 40 

Al Table of correspondence 122 

A2 Table of curve numbers for AMC I and AMC III .... 123 
A3 Soil names and hydrologic classifications 124 



xv 



LIST OF EXHIBITS 

Exhibit Page 

1 Output of XSRAIN for example of 

Main Option One . . . 49 

2 Output of XSRAIN for example of 

Main Option Two 57 

3 Output of XSRAIN for example of 

Main Option Three 70 

4 Output of XSRAIN for example of 

Main Option Four 81 

Al Complete listing of Program XSRAIN 145 



I . INTRODUCTION 

The estimation of rainfall-runoff relations in ungaged watersheds 
is a common problem in engineering hydrology. Typically, the problem is 
approached with statistical or empirical tools, the lack of necessary 
data preventing a physical modeling of the processes involved. The 
research report which this user's manual accompanies, however, shows how 
a correspondence can be established between the Soil Conservation 
Service's curve number, (a runoff index calibrated against soil-land 
cover complexes), and the hydraulic soil parameters appearing in modern, 
physically based infiltration equations. Such a correspondence permits 
the physical modeling of the abstraction of rainfall in basins for which 
there is a minimum of available hydrologic information. The purpose of 
the program XSRAIN is to facilitate the application of a curve number- 
soil parameters correspondence to the prediction of flood hydrographs. 

Program XSRAIN can generate a flood hydrograph for a given rainfall 
event using readily available information on the physical character- 
istics of the watershed in question. Determination of an SCS curve 
number from soil and land cover types permits the abstraction of 
rainfall by means of physical infiltration equations. The routing of 
the excess rain to yield an outflow hydrograph for the basin outlet is 
accomplished by means of the SCS dimensionless unit hydrograph (mass 
curve) . This requires the input of additional morphological and 
time-of-travel characteristics which can be estimated from topographic 
maps. 

The influence of soil moisture variation on runoff volumes due to 
seasonality and antecedent rainfall may be incorporated if such 
information is available. However, this is optional—one may simply 
assume "average" antecedent soil moisture conditions. 

For purposes of comparison, there is an option available whereby 
one may elect to have calculations made using the standard SCS equation 
for excess precipitation, as well as calculations using the assumption 
of a uniform rainfall intensity. 

In general, an effort was made to keep program XSRAIN flexible in 
terms of the required assumptions and the form of the input data 
utilized in its application. 



II. IMPLEMENTATION 

1. Preliminary Work 

1.1 Units Employed in XSRAIN 

Program XSRAIN was written to perform all calculations in terms of 
English units. The metric equivalents of these units are presented 
here: 

1 in. = 25.4 mm 

1 ft = 0.3048 m 

1 sq mi = 259.00 hectare 

3 
35.31 cfs = 1 m /sec 

1.2 Determination of Curve Number 

Regardless of which particular option offered by XSRAIN is 
ultimately chosen by the user, the first step that must be taken is the 
determination of a curve number (abbreviated as CN) for the watershed in 
question. Procedures for accomplishing this are outlined in detail in 
the SCS National Engineering Handbook, Section 4, Hydrology, Chapters 
7-10, in particular (hereafter referred to as NEH-4) . Those procedures 
will be covered briefly here. 

The first step is to obtain soil survey information from the SCS 
state soil scientist for the watershed in question. From this one can 
determine the names and areal extents of the soils occurring in the 
watershed. Using Table 7.1 of NEH-4 (reproduced in the appendix of this 
User's Manual) one can determine the hydrologic group of the soils: A, 
B, C or D. These hydrologic groups are defined by the SCS by the 
following descriptions: 

"A. (Low runoff potential). Soils having high infiltration 
rates even when thoroughly wetted and consisting chiefly 
of deep, well to excessively drained sands or gravels. 
These soils have a high rate of water transmission. 
B. Soils having moderate infiltration rates when thoroughly 
wetted and consisting chiefly of moderately deep to deep, 
moderately well to well drained soils with moderately 
fine to moderately coarse textures. These soils have a 
moderate rate of water transmission. 



C. Soils having slow infiltration rates when thoroughly 
wetted and consisting chiefly of soils with a layer that 
impedes downward movement of water, or soils with 
moderately fine to fine texture. These soils have a slow 
rate of water transmission. 

D. (High runoff potential). Soils having very slow 
infiltration rates when thoroughly wetted and consisting 
chiefly of clay soils with a high swelling potential, 
soils with a permanent high water table, soils with a 
claypan or clay layer at or near the surface, and shallow 
soils over nearly impervious material. These soils have 
a very slow rate of water transmission." (p. 7.1, NEH-4) 

Once hydrologic soil groups have been identified, one consults 
Tables 1 and 2 (taken from NEH-4 and SCS Technical Release No. 55) where 
curve numbers are tabulated by land use, treatment and hydrologic soil 
group. Using the characteristics of the watershed in question, the 
appropriate CN can be identified. 

"A composite curve number (CN) for a watershed having 
more than one land use, treatment or soil type can be found by 
weighting each curve number according to its area. If, for 
example, 80 percent of a watershed has a CN of 75 and the 
remaining 20 percent is impervious (CN=100) , then the weighted 
CN = 0.80 x 75 + 0.20 x 100 = 80." (Viessman, et al., 1977, 
p. 618) 

Hydrologic condition refers to the relative propensity of a land 
use to produce runoff and therefore be susceptible to soil erosion. For 
example, pasture which is heavily grazed by cattle would yield large 
amounts of runoff and hence be in poor hydrologic condition. On the 
other hand, pasture which is only lightly grazed and has good plant 
cover would be in good hydrologic condition. 

Detailed description of the land use and land treatment classes 
used in Table 1 is provided in Chapter 8 of NEH-4. 

Having identified a CN for the watershed of interest, one may next 
consult the Table of Correspondence (Table Al) in the appendix of this 



Table 1. Runoff curve numbers for hydrologic soil-cover complexes 
(antecedent moisture condition II, and I = 0.2 S) (from 
NEH-4), p. 9.2). a 







Cover 




Hydro 


logic 


Soil 






Treatment 


Hydrologic 


Group 


Land Use 


or Practice 


Condition 


A 


B 


C 


D 


Fallow 


Straight row 





77 


86 


91 


94 


Row crops 


Straight row 


Poor 


72 


81 


88 


91 




Straight row 


Good 


67 


78 


85 


89 




Contoured 


Poor 


70 


79 


84 


88 




Contoured 


Good 


65 


75 


82 


86 




Contoured and 














terraced 


Poor 


66 


74 


80 


82 




Contoured and 














terraced 


Good 


62 


71 


78 


81 


Small grain 


Straight row 


Poor 


65 


76 


84 


88 




Straight row 


Good 


63 


75 


83 


87 




Contoured 


Poor 


63 


74 


82 


85 




Contoured 


Good 


61 


73 


81 


84 




Contoured and 














terraced 


Poor 


61 


72 


79 


82 




Contoured and 












/ 


terraced 


Good 


59 


70 


78 


81 


Close-seeded 


Straight row 


Poor 


66 


77 


85 


89 


legumes 1/ 


Straight row 


Good 


58 


72 


81 


85 


or 


Contoured 


Poor 


64 


75 


83 


85 


rotation 


Contoured 


Good 


55 


69 


78 


83 


meadow 


Contoured and 














terraced 


Poor 


63 


73 


80 


83 




Contoured and 














terraced 


Good 


51 


67 


76 


80 


Pasture 




Poor 


68 


79 


86 


89 


or range 




Fair 


49 


69 


79 


84 






Good 


39 


61 


74 


80 




Contoured 


Poor 


47 


67 


81 


88 




Contoured 


Fair 


25 


59 


75 


83 




Contoured 


Good 


6 


35 


70 


79 



Meadow 
Woods 



Good 



30 



58 



71 



78 



Poor 


45 


66 


77 


83 


Fair 


36 


60 


73 


79 


Good 


25 


55 


70 


77 



Farmsteads 



59 



74 



82 



86 



Roads (dirt) 2/ 

(hard surface)2/ 



72 
74 



82 
84 



87 
90 



89 
92 



\_l Close-drilled or broadcast 
2/ Including right-of-way 



Table 2. Runoff curve numbers for selected agricultural, suburban, 
and urban land use (antecedent moisture condition II, and 
I = 0.2 S) (from SCS Technical Release No. 55, p. 2-5). 



Hydrologic Soil Group 



Land Use Descriptions 


A 


B 


C 


D 


Cultivated land 1/: without conservation treatment 


72 


81 


88 


91 


with conservation treatment 


62 


71 


78 


81 


Pasture or range land: poor condition 


68 


79 


86 


89 


good condition 


39 


61 


74 


80 


Meadow: good condition 


30 


58 


71 


78 


Wood or forest land: thin stand, poor cover, no mulch 


45 


66 


77 


83 


good cover 2/ 


25 


55 


70 


77 



Open spaces, lawns, parks, golf courses, cemeteries, etc. 

good condition: grass cover on 75% or more of the area 39 61 74 80 
fair condition: grass cover on 50% to 75% of the area 49 69 79 84 



Commercial and business areas (85% impervious) 



89 



92 



94 



95 



Industrial districts (72% impervious) 



91 



93 



Residential 3/: 

Average lot size 
1/8 acre or less 
1/4 acre 
1/3 acre 
1/2 acre 
1 acre 



Average % impervious 4/ 
65 
38 
30 
25 
20 



77 


85 


90 


92 


61 


75 


83 


87 


57 


72 


81 


86 


54 


70 


80 


85 


51 


68 


79 


84 



Paved parking lots, roofs, driveways, etc. 5/ 



98 



98 



98 



98 



Streets and roads: 

paved with curbs and storm sewers 5/ 

gravel 

dirt 



98 


98 


98 


98 


76 


85 


89 


91 


72 


82 


87 


89 



1/ For a more detailed description of agricultural land use curve numbers refer to 
National Engineering Handbook, Section 4, Hydrology, Chapter 9, Aug. 1972. 

2/ Good cover is protected from grazing and litter and brush cover soil. 

3/ Curve numbers are computed assuming the runoff from the house and driveway is directed 
towards the street with a minimum of roof water directed to lawns where additional 
infiltration could occur. 

4/ The remaining pervious areas (lawns) are considered to be in good pasture condition 
for these curve numbers. 



5/ In some warmer climates of the country a curve number of 95 may be used. 



User's Manual to determine the equivalent hydraulic soil properties. 
From that table values for hydraulic conductivity at natural saturation, 
K (in./hr), and for storage suction factor at field capacity , (S f ) f 
(in.) are obtained. Storage suction factor is defined by the equation: 

S f = (e-e.) H f (1.1) 

where H f is wetting front suction of the soil (effective capillary 
drive) (in.), is water content of the soil at natural saturation 
(dimensionless) , and 6. is initial water content. 

(S ) is the value of S f (the storage suction factor) obtained 
when 0. = , being the water content at field capacity, a 
condition comparable to the SCS antecedent moisture content (AMC) 
type II. Natural saturation refers to saturation under field condi- 
tions, where water content, 0, is always somewhat less the the porosity, 
(j), due to the inevitable presence of entrapped air. 

Alternatively, it can be left to XSRAIN to compute K and (S f ) f 
from the curve number under Suboption 2 (see Section 2.6). 

Additional watershed descriptors must be input so that the 
calculated excess rainfall pattern may be routed to the basin outlet by 
the SCS dimensionless unit hydrograph. Among these descriptors are the 
basin area in square miles, the average watershed slope in percent and 
the length in feet from the basin outlet to the divide. These can be 
readily determined from a topographic map. 

Two options require more information if they are elected. Exact 
input requirements are described in the Option Summaries. 

All options require the specification of a rainfall duration and 
cumulative depth. This information is provided by the user according to 
design needs. A time distribution of the rainfall may also be speci- 
fied, or it may be left to the program to impose a time distribution 
pattern. 

XSRAIN uses the time distributions identified by Huff (1967) in his 
study of storms occurring in Central Illinois. He classified four types 
of storms, according to whether peak rainfall occurred in the first, 
second, third or fourth quartile of the storm duration. For each type 



he derived curves of cumulative percent of precipitation vs. cumulative 
percent of storm time. XSRAIN can use the median (50 percent 
probability) curve for any of the four storm types. As a guide to 
choosing which quartile to specify for peak rainfall, consult Table 3. 

Table 3. Percentage distribution of quartile types. After Huff (1967). 





Percent of Cases for 
Given Duration 
(Hours) 


Quartile 
Frequency 
(%) 


Quartile 


<12 


12-24 


>24 


1 


45 


29 


26 




32 


2 


50 


33 


17 




34 


3 


35 


42 


23 




25 


4 


22 


26 


52 




9 


All Storms 


42 


33 


25 




100 




20 40 60 80 100 

CUMULATIVE PERCENT OF STORM TIME 



Figure 1. Time distribution of first-quartile storms 
After Huff (1967). 




"0 20 40 60 80 100 

CUMUl ATIVE PERCENT OF STORM TIME 



Figure 2. Time distribution of second-quartile storms 
After Huff (1967). 




20 40 60 80 100 

CUMULATIVE PERCENT OF STORM TIME 



Figure 3. Time distribution of thirs-quartile storms 
After Huff (1967). 




20 40 60 80 100 

CUMULATIVE PERCENT OF STORM TIME 



Figure 4. Time distribution of fourth-quartile storms 
After Huff (1967). 



5 

i 

-J 

2 
S 

6 



40 



20 







i i i 

50% PROBABILITY 




m 


/// 


% 


VY/777V//X//Ar-r-r7rT77-. 



CUMULATIVE PERCENT OF STORM TIME 



Figure 5. A first-quartile, 50 percent probability time 
distribution. After Huff (1967). 



An example of a first quartile, 50 percent probability histogram is 
given in Figure 5. First- and second-quartile storms are seen to be the 
most common, although storm duration is an important factor in 
determining in which quartile the rainfall peak occurs, as the table 
shows. In general, Huff identified: 

"A trend for the longer heavier storms to dominate the fourth- 
quartile grouping, whereas short duration storms account for a 
major portion of the first- and second-quartile groups." 
(Huff, 1967, p. 1008) 

Having identified watershed descriptors and a design storm, the 
user should consult the following Option Summaries to see which to 
employ when running XSRAIN. 

Table 3 and Figures 1-5 are drawn from, "The Distribution of 
Rainfall in Heavy Storms," by F. A. Huff, in Water Resources Research 
Journal, Volume 3, Number 4, p. 1007. 

As stated, the user may specify a time distribution of rainfall. 
This can be read in to be used "as is," or XSRAIN can be called upon to 
rearrange the input rainfall steps to form a U.S. Army Corps of 
Engineers "balanced hyetograph." Details are given in the option 
summaries and the description of subroutine BALANCE. 

2. Option Summaries 

All main options calculate excess rainfall for a variable rainfall 
pattern by the infiltration approach. A tabulation is made by time 
steps of cumulative infiltration, incremental infiltration, mean infil- 
tration rate, mean rainfall rate and mean excess rainfall rate, and a 
mass balance check is provided. Watershed descriptors are used to 
derive a unit hydrograph from the SCS dimensionless mass curve, and this 
in turn is used to route the computed excess rainfall and produce a 
runoff hydrograph in cfs. Under Suboption 1, it is possible to have 
these same calculations made by three additional means of computing 
excess rain, for purposes of comparison. These three cases are: the 
infiltration approach, with constant rainfall assumed; the SCS method, 
with variable intensity rainfall; and the SCS method, with constant 
rainfall assumed. 



10 



2. 1 Main Option One—Imposed Time Distribution of Rainfall and 
Average Soil Moisture Conditions 

This option will impose a Huff rainfall time distribution according 

to the quartile and time step specified by the user. Field capacity 

soil moisture (AMC II) is assumed. 

Inputs 

The user must provide the following information when employing this 
option: 

CN, curve number 

K, hydraulic conductivity (in./hr) 

(S f ) f , storage suction factor at field capacity (in.) 

(The reading in of K and (S f ) f is optional under Suboption 2) 

P, cumulative depth of rainfall (in.) 

t_, duration of storm (hr) 

LAGFLAG: if LAGFLAG = 0, watershed lag time (TL, hr) is computed 
from the following parameters: CN, the watershed curve 
number; L, the length from basin outlet to the divide 
(ft); Y, average watershed slope (percent); if 
LAGFLAG = 1 , TL is provided by the user. 

Area, in square miles 

Q, Huff quartile (1, 2, 3 or 4) 

At, time step for rainfall distribution (min) . 

Outputs 

The following information is provided by XSRAIN under this option: 

Values of cumulative precipitation (in.) at the end of each time 
step according to the Huff time distribution 

Time (hr) at the end of each time step 

Mean rainfall intensities for each time step (in./hr) 

A unit hydrograph computed from the SCS dimensionless mass curve 

The watershed lag time (hr) 

The time to peak of the unit hydrograph (hr) 

t , ponding time for variable intensity rainfall (hr) 

r , rainfall intensity producing ponding (in./hr) 

W , cumulative depth of rainfall infiltrated up to ponding (in.) 

Last full-time step previous to ponding time 



11 



An excess rainfall pattern (in./hr) 

A mass balance check 

A flood hydrograph, in cfs vs. hr. 
If SCS calculations are opted for under Suboption 1 additional outputs 
are: 

S, the maximum watershed storage capacity as defined by SCS (in.) 

I , the initial abstraction as defined by SCS (in.) 

Subroutines 

The following subroutines are called by XSRAIN under this option: 

HUFF, UH, PONTIM, PPINF, ROUTE, CONSTR AND SCS (if comparison 
hydrographs are generated, that is, Suboption 1=4), TABLE (if K 
and S f are computed from CN, that is, Suboption 2=1). 

2.2 Main Option Two—Imposed Time Distribution of Rainfall and 
Antecedent Soil Moisture Accounting 

This option will also impose a Huff rainfall time distribution 

according to the quartile and time step specified by the user. Storage 

suction factor is modified for the infiltration equations, and so is the 

CN for the SCS equations. Modifications are based upon the day of the 

year and the five day antecedent rainfall depths, additional information 

which must be provided by the user. 

Inputs 

The user must provide the following information when employing this 
option: 

CN, curve number 

K, hydraulic conductivity (in./hr) 

(S ) , storage suction factor at field capacity (in.) 

(The reading in of K and (S f ) f is optional under Suboption 2) 

P, cumulative depth of rainfall (in.) 

t~, duration of storm (hr) 

LAGFLAG: if LAGFLAG = 0, watershed lag time (TL, hr) is computed 
from the following parameters: CN, the watershed curve 
number; L, the length from basin outlet to the divide 
(ft); Y, average watershed slope (percent); if 
LAGFLAG = 1 , TL is provided by the user. 

Area, in square miles 

Q, Huff quartile (1, 2, 3 or 4) 



12 



At, time step for rainfall distribution (min) 

Month and day of the year 

Rainfall for previous five days (in.). 

Outputs 

The following information is provided by XSRAIN under this option: 

Values of cumulative precipitation (in.) at the end of each time 
step according to the Huff time distribution. 

Time (hr) at the end of each time step 

Mean rainfall intensities for each time step (in./hr) 

S, (in.), the maximum watershed storage according to SCS for 
antecedent moisture condition II 

Effective depth of soil profile (in.) 

H f , wetting front suction (in.) 

Julian date 

S, (in.), seasonally adjusted by sine approximation (see 
Section 3.2) 

(6-8.), moisture deficit adjusted for season and antecedent 
rainfall 

S f , storage suction factor adjusted for season and antecedent 
rainfall (in.) 

A unit hydrograph computed from the SCS dimensionless mass curve 

t , ponding time for variable intensity rainfall (hr) 

r , rainfall intensity producing ponding (in./hr) 

W , cumulative depth of rainfall infiltrated up to ponding (in.) 

Last full time step previous to ponding 

An excess rainfall pattern (in./hr) 

A mass balance check 

A flood hydrograph, in cfs vs. hr. 

If SCS calculations are opted for under Suboption 1, additional outputs 
are: 

CN, S, I , adjusted for time of year and AMC. 

3 

Subroutines 

The following subroutines are called by XSRAIN under this option: 

HUFF, DEFICIT, UH, PONTIM, PPINF, ROUTE, CONSTR AND SCS (if 
comparison hydrographs are generated, that is, Suboption 1=4), 
TABLE (if K and S f are computed from CN, that is, 
Suboption 2=1). 



13 



2.3 Main Option Three—User Specified Time Distribution of 
Rainfall and Antecedent Soil Moisture Accounting 

With this option, the user provides a time distribution of rainfall 

to be used "as is," or else a set of times and steps of rainfall to be 

rearranged into a U.S. Army Corps of Engineers "balanced hyetograph." 

Time steps may be entered in either minutes or hours, and steps of rain 

may be read in as either incremental depths (in.) or intensities 

(in./hr). 

The user also provides information as to day of the year and five 
day antecedent rainfall depths for modification of S f and CN. 

Inputs 

The user must provide the following information when employing this 
option: 

CN, curve number 

K, hydraulic conductivity at natural saturation (in./hr) 

(S f ) f , storage suction factor at field capacity (in.) 

(The reading in of K and (S f ) f is optional under Suboption 2) 

P, cumulative depth of rainfall (in.) 

t„, duration of storm (hr) 

LAGFLAG: - if LAGFLAG = 0, watershed lag time (TL, hr) is computed 
from the following parameters: CN, the watershed curve 
number; L, the length to the divide from basin outlet 
(ft); Y, the average watershed slope (percent); if 
LAGFLAG = 1, TL is provided by the program user. 

AREA, in square miles 

Month and day of the year 

Rainfall depth for each of the previous five days (in.) 

N, the number of time steps of rainfall 

PFLAG: if PFLAG = 0, input rain is in in./hr; if PFLAG = 1, 
input rain is in inches. 

CFLAG: if CFLAG = 0, user time distribution of rain is used "as 
is;" if CFLAG =1, a Corps of Engineers "balanced 
hyetograph" is formed from input steps of rain. 

TFLAG: if TFLAG = 0, input times are in minutes; if TFLAG = 1, 
input times are in hours. 

T(I), (1=1, N), the set of times at the end of each step, all of 
equal length, in either minutes or hours 

R(I), (1=1, N), the set of steps of rain, expressed either as 

increments of depth (in.) or as intensities (in./hr). 



14 



Outputs 

The following information is provided by XSRAIN under this option: 

Values of cumulative precipitation (in.) at the end of each time 
step. 

S, (in.), the maximum watershed storage according to SCS for 
antecedent moisture condition II 

Effective depth of soil profile (in.) 

H f , wetting front suction (in.) 

Julian date 

S, (in.), seasonally adjusted by sine approximation (see 
Section 3.2) 

(0-0.), moisture deficit adjusted for season and antecedent 
rainfall 

A unit hydrograph computed from the SCS dimensionless mass curve 

t , ponding time for variable intensity rainfall (hr) 

r , rainfall intensity producing ponding (in./hr) 

W , quantity infiltrated up to ponding (in.) 

Last full time step previous to t 

y p 

An excess rainfall pattern (in./hr) 

A mass balance check 

A flood hydrograph, in cfs vs. hr. 
If SCS calculations are opted for under Suboption 1, additional outputs 
are: 

CN, S, I , adjusted for time of year and AMC. 

Subroutines 

The following subroutines are called by XSRAIN under this option: 

DEFICIT, UH, PONTIM, PPINF, ROUTE, CONSTR and SCS (if comparison^ 
hydrographs are generated, that is, Suboption 1=4), TABLE (if K 
and S, are computed from CN, that is, Suboption 2 = 1), BALANCE 

(if a "balanced hyetograph" is formed, that is, CFLAG = 1). 

2.4 Main Option Four—User Specified Time Distribution of Rainfall 
and Average Soil Moisture Conditions 

As in Main Option 3, the user provides a time distribution of 
rainfall to be used "as is," or else a set of times and steps of rain- 
fall to be rearranged into a U.S. Army Corps of Engineers "balanced 
hyetograph." Time steps may be entered in either minutes or hours, and 



15 



steps of rain may be read in as either incremental depths (inches) or 
intensities (in./hr). 

This option is simpler than Main Option 3 in that it assumes field 
capacity soil moisture conditions (AMC II). 

Inputs 

The user must provide the following information when employing this 
option: 

CN, curve number 

K, hydraulic conductivity (in./hr) 

(S f ) f , storage suction factor at field capacity (in.) 

(The reading in of K and (S f ) f is optional under Suboption 2) 

P, cumulative depth of rainfall (in.) 

t-, duration of storm (hr) 

LAGFLAG: if LAGFLAG = 0, watershed lag time (TL, hr) is computed 
from the following parameters: CN, the watershed curve 
number; L, the length to the divide from basin outlet 
(ft); Y, the average watershed slope (percent); if 
LAGFLAG = 1, TL is provided by the program user. 

AREA, in^square miles 

N, the number of time steps of rainfall 

PFLAG: if PFLAG = 0, input rain is in in./hr; if PFLAG = 1, 
input rain is in inches. 

CFLAG: if CFLAG = 0, user time distribution of rain is used 
"as is;" if CFLAG = 1, a Corps of Engineers "balanced 
hyetograph" is formed from input steps of rain. 

TFLAG: if TFLAG = 0, input times are in minutes; if TFLAG = 1, 
input times are in hours. 

T(I), (1=1, N), the set of times at the end of each step, all of 
equal length, in either minutes or hours 

R(I), (1=1, N), the set of steps of rain, expressed either as 

increments of depth (in.) or as intensities (in./hr). 

Outputs 

The following information is provided by XSRAIN under this option: 

Values of cumulative precipitation (in.) at the end of each time 
step 

A unit hydrograph computed from the SCS dimensionless mass curve 

t , ponding time for variable intensity rainfall (hr) 



16 



r , rainfall intensity producing ponding (in./hr) 

W , cumulative depth of rainfall infiltrated up to ponding (in.) 

Last full time step previous to ponding t 

An excess rainfall pattern (in./hr) 

A mass balance check 

A flood hydrograph, in cfs vs. hr. 

If SCS calculations are opted for under Suboption 1, additional 

outputs are: 

CN, S, I for AMC II. 
' ' a 

Subroutines 

The following subroutines are called by XSRAIN under this option: 

UH, PONTIM, PPINF, ROUTE, CONSTR AND SCS (if comparison hydrographs 

are generated, that is, Suboption 1 = 4), TABLE (if K and S f 

are computed from CN, that is, Suboption 2 = 1), BALANCE (if a 
"balanced hyetograph" is formed, that is, CFLAG = 1). 

2.5 Suboption l--Comparison Hydrographs Found with Alternate Means 
of Computing Excess Rainfall 

This suboption permits the production of extra flood hydrographs 

for comparison of results using other methods of calculating excess 

rainfall. If these comparisons are not desired, a value of one should 

be read in (SUB0PT1=1) and excess rain will be calculated by only one 

approach—by the infiltration method for a variable intensity rainfall 

event. 

If this suboption is set equal to four (SUB0PT1=4) , three 
additional means of computing excess rainfall will be executed: by 
infiltration method, for constant rainfall; by SCS method for variable 
rainfall; and by SCS method for constant rainfall. In every case, a 
flood hydrograph is produced by calling subroutine ROUTE. 

2.6 Suboption 2--Specification of Soil Hydraulic Parameters 
Under this option there are two possible means of providing the 

hydraulic soil parameters necessary for computation of infiltration (the 
hydraulic conductivity, K (in./hr), and the storage suction factor at 
field capacity, (S f ) f (in.)). If Suboption 2 is set equal to zero 
(SUB0PT2=0), then the user must input these values, either after 



17 



consulting the Table of Correspondence or based on some other means of 
estimation. This option permits experimentation on the part of the 
user. 

Alternatively, it may be left to XSRAIN to compute K and (S f ) f 
from the SCS curve number (SUB0PT2=1). This is done by subroutine 
TABLE. 

3. Description of Subroutines 

3. 1 Subroutine HUFF: Imposition of a Time Distribution on a Given 
Depth and Duration of Rainfall 

This subroutine first converts the user specified time step, At, to 
units of hours. Subroutine HUFF proceeds to divide the storm duration, 
t~, into ten equal steps. These time steps (PT(I)) are used to form a 
discretized version of a Huff rainfall time distribution (see 
Figure 6). Then, according to the quartile specified, cumulative depths 
of precipitation (PP(I)) are calculated which correspond to each of the 
ten discrete steps. Next, the storm duration is divided by the 
specified time step, At, to get the number of time steps (N) that will 
appear in the output and upon which all subsequent calculations will be 
based. In DO loop 10, linear interpolation is performed between the 
steps of the discretized Huff rainfall time distribution to get cumula- 
tive precipitation depths for the user-specified time steps. For 
example, in Figure 6 we see that the time at the end of user time step 
t. has a corresponding depth of cumulative precipitation (by linear 
interpolation) equal to 68 percent of the total cumulative 
precipitation. In DO loop 30, these steps of cumulative precipitation 
are used to compute mean rainfall intensities corresponding to the 
user-specified time steps. 

Variable List 

FORTRAN Symbol Math Symbol Definition 

DELT At User specified time step. Read-in 

in minutes. Converted to hours by 
HUFF. 



18 



Variable List (continued) 



FORTRAN Symbol 



Math Symbol 



Definition 



PT(I) 



(o.i)(i)(t D ) 



Time (hr) at end of 'Ith' 10 percent 
step of discretized Huff time 
distribution imposed on storm 
duration. 



PP(D 



N 



N 



Depth of cumulative precipitation 
(in.) assigned to time PT(I). 
Assignment depends on quartile (Q) 
in which peak rainfall occurs. 



TD 


fc D 


Time elapsed since beginning of 
storm (storm duration) . 


P 


P 


Cumulative depth of rain for entire 
storm. 


CUMP(I) 




Cumulative depth of rain (in.) at 
end of 'Ith' user time step. 


Q 


Q 


Huff quartile (1, 2, 3 or 4). 



Number of time steps of length 
specified by user occurring in 
storm. Last step may be of an 
odd length. 



T(I) 



Elapsed time at end of 'Ith' time 
step of user-specified length. 



R(D 



Mean rainfall intensity during 'Ith' 
time step of user-specified length. 



IFLAG 



Flag variable used in interpolation 
loop 10. Keeps track of number of 
full 10 percent timesteps (PT(I)) 
occurring before user time step in 
question (T(I). 



3.2 Subroutine DEFICIT: Revision of Moisture Deficit for Season 
and Antecedent Rain 

This subroutine adjusts the moisture deficit at field capacity, 
(6-8,. ) , in response to time of year and five day antecedent rainfall 
depths. It is a sort of moisture accounting scheme adapted for applica- 
tion on an event basis rather than a continuous one as would be used by 
a simulation model. 



19 



PT(I) 



(3) (4) (5) (6) (7) (8) (9) (10) PP 



g 

e 

or 

Q_ 



en 

P 

CO 

o 

z 

bJ 
O 

q: 

uj 

Q. 

UJ 
> 

5 



ID 
O 




20 30 40 50 60 70 80 90 
CUMULATIVE PERCENT OF STORM DURATION 



100 



Figure 6. Example of a discretized version of Huff rainfall time 

distribution for the case of a storm with the peak occurring 
in the second time quartile. 



20 



One of the principal assumptions of this subroutine is that soil 
moisture variation through the year may be approximated by a sine curve. 
This assumption is based upon soil moisture lysimeter data presented in 
USDA Technical Bulletin No. 1367, (1967). Figures in this publication 
show soil moisture varying in a roughly sinusoidal way through the year, 
with small, jagged fluctuations about such a path, assumed due to short 
term wetting and drying. An example is shown here in Figure 7. 

The second major assumption employed in this subroutine is that the 
SCS parameter S (in.), for AMC II, is the volume of soil pore space 
available to be filled by water when the soil moisture content is at 
field capacity. Hence, S = (8-8 f ) D , where D is the effective soil 
profile depth expressed in inches. D is taken to be a constant 
watershed characteristic. 




Figure 7. From USDA Technical Bulletin No. 1367 (1967) "Evaluation of 
Agricultural Hydrology by Monolith Lysimeters, 1956-62." 
Seasonal sine curve added by authors. 



21 



These assumptions are exploited by DEFICIT in the following manner. 
First, S for AMC II is computed by the SCS formula: S = 1000/CN - 10. 
Then the moisture deficit at field capacity is calculated by the 
equation (6-9 ) = 0.253 - .002 CN. (This regression was developed in 
the establishment of the SCS-inf iltration correspondence, see Appendix). 
Next, the effective soil profile depth is calculated: D = S/(6-0 ). 
Wetting front suction is calculated by H^ = (S,.),. /(6-0„ ). Recall 

o J £ f'fc fc 

that the definition of storage suction factor at field capacity is 

(S,.),. = H,-(8-6,. ). Julian date is calculated from the month and day 
f fc f fc J 

specified by the user with the formula: 

Julian date = 30 x (month-1) + day . (3.2.1) 

This date is used in the argument of the sine function used to 
approximate seasonal variation of S. Seasonal S is computed with 
the formula: 

Seasonal S = 1.3S { Uin(Julian date-5+180°] + 1 } + Q ^ (322) 

This formula gives a seasonal S for the date five days before the 
storm of interest, so that five day antecedent rainfall can be used to 
arrive at an S value for the day of the storm, hence the -5 term in 
the argument of the sine. The 180 is the phase shift of the sine curve 
from the beginning of the year. Work on the establishment of SCS 
infiltration correspondence showed that the minimum (AMC III) moisture 
deficit could be approximated by: 

(§ - 6) AMC III = °-2fl-«fc> • (3 - 2 ' 3) 

If follows analogously that: 

S AMC III = 0>2 S AMC II * (3.2.4) 

This is where the 0.2S term in the seasonal S equation came from. 
Study of figures of lysimeter data from USDA Technical Bulletin No. 1367 
suggested a maximum seasonal moisture deficit occurring in late summer 
which could be approximated by: 

Late summer (0-0.) = 1.5(6-6. ) . (3.2.5) 

l fc 



22 



Through the year, S varies between 0.2 S. Mr TT at the end of winter 

and 1.5 S.„„ T , at the end of summer. This explains the 1.3 S term 

AMC II c 

of the equation. When sine = -1, S = 0.2 S. Mr TT ; when sine = 1, 

S = 1 * 5 S AMC ir 

Once a seasonal S has been established, it is modified by the 
five day antecedent rainfall to get a value for the day of the storm. 
The S is treated in much the same way as an antecedent precipitation 
index (API), the difference being that S is the measure of the dryness 
of a watershed, and API an indicator of the wetness of a watershed. 
When using an API, a value for a day without rain is taken as the value 
from the day before times a factor such as 0.94. The converse of this 
is done by DEFICIT. S for a day without rain is computed as 1.06 times 
the value from the day before. For example, if S = 6.00 in. on a given 
day, and it is followed by a day of drying (no rain), the new S value 
is calculated to be 1.06 x 6.00 = 6.36 in. If a second day of dryness 
occurs the new value of S would be 1.06 x 6.36 = 6.74 in. (Study of 
figures in USDA Technical Bulletin 1367, like Figure 7 of this manual, 
suggested the factor 1.06.) Rainfall in the five day period will reduce 
S by the amount infiltrated, W. This is estimated by simply using the 
SCS equation with S = S and I = 0.2 S. Thus 

(P-0.2 S) 2 ( , 

W * P + 0.8 S UJ.f.bJ 

on a given day of rain depth P. If, referring to the above example, it 
was found that an amount, W (in.), was infiltrated on that second day, 
S would have turned out to be (1.06 x 6.36) - W = (6.74-W) in., instead 
of the 6.74 in. calculated for no rain on the second day. In this 
manner, the seasonal S calculated by the sine approximation is 
modified by the rainfall depths reported for the five days previous to 
the day of the storm in question to give an adjusted S . 



The adjusted S is used to calculate an adjusted moisture deficit, 



(8-e.) 



( e-e.) = ad J u g ted s . (3.2.7) 

e 



23 



This, in turn, is used to calculate a storage suction factor: 
S f = H f (6-6.) 



(3.2.8) 



This value of S f is used in subsequent subroutines for calculations of 
ponding time and infiltration. 



Variable List 



FORTRAN Symbol 


Math Symbol 


Definition 


JDATE 




Julian date 


MO 




Month (1-12) 


DAY 




Day of the month (1-31). 


S 


S 


SCS parameter S, AMC II (in.). 


CN 


CN 


SCS curve number. 


DFC 


(e-e fc ) 


Moisture deficit at field capacity. 


DEPTH 


D 
e 


Effective soil profile depth (in.). 


HF 


H .f 


Wetting front suction (in.). 


SFFC 


( Vfc 


Storage suction factor at field 
capacity (in. ) . 


SB 




Seasonally adjusted S (in.). 


SA 




S adjusted for season and 
antecedent rainfall (in.). 



AR(1) 
AR(2) 
AR(3) 
AR(4) 
AR(5) 



Depth of rain occurring 5 days 

before storm (in.). 

Depth of rain occurring 4 days 

before storm (in.). 

Depth of rain occurring 3 days 

before storm (in.). 

Depth of rain occurring 2 days 

before storm (in.). 

Depth of rain occurring 1 day 

before storm (in.). 



AQ 



Excess precipitation on one of the 
5 antecedent days (in.). 



24 



Variable List (continued) 



FORTRAN Symbol 



Math Symbol 



Definition 



SMAX 



max 



S max = 2 S AMC II" Corresponds to 
wilting point moisture deficit, 







(6-0 .,). 

Wll 


SF 


S f 


Storage suction factor (in.). 


DA 


(6-e.) 


Moisture deficit adjusted for season 
and five day antecedent rainfall. 



3.3 Subroutine UH: Determination of a Unit Hydrograph from the 
SCS Dimensionless Mass Curve 

Subroutine UH computes a unit hydrograph for the event and 

watershed of interest from the SCS dimensionless mass curve. This 

processs is begun by computing the watershed lag time unless it has been 

specified by the user. The formula is: 



h = 



£ - 8 (S+l) - 7 



1900 Y 



0.5 



(3.3.1) 



where t„ is the lag time (hr) , £ is the length to the divide from the 
basin outlet (ft), Y is the average watershed slope (percent), and 
S = (1000/CN) - 10, the watershed storage (in.). Lag time is defined in 
NEH-4 as ". . . the time from the center of mass of excessive rainfall 
to the peak rate of runoff . . . " (p. 15-4). 

The lag time is in turn used to estimate the time to peak, T , by 
the formula: 



At 
T = — + t 
p 2 £ 



(3.3.2) 



where T is time to peak (hr) , and At is the length of a time step in 

the input rainfall pattern (hr) . This time to peak is descriptive only 

of the hydrograph produced by one inch of rainfall occurring in the 

period At. It is not the time to peak of the event of interest. T 

P 

is calculated because the time scale of the dimensionless mass curve is 
normalized with respect to this value, and hence it must be known to be 
able to make use of the mass curve, to derive a unit hydrograph. 



25 



O 



M 










lili- fert^T1,:.L::J 






.9 










■A^T^A : [■:::::: .: :: ::; 

. - ^«* i - - ■ ■ * • 














r !::! '::: j ' . • i : . . 1 








• 








■■:•■ | .-. :-■! »•• " 

q ^DISCHARGE AT TIME t 




.8 








= PFAK Dl^rHAR^F 












,; ee .: ...l;.:ih:Qo 




:■:■::::: 






= ACCUMULATED VOLUME 

AT TIME t 
= TOTAL VOL UMF 












' | ■ ■ C 


.7 






=A SELECTED TIM 

, = TIME FROM BEGI 

OF RISE TO THE F 














1 


E 

mningI:! 
















•/..:..-. Tr 












. 


1 


>EAK :::i .:..:! 














... ... 


........ 


6 




























... 

-■:-••••+----•] ■ ' • 

1 ' • ' 
























;:::•: 


;__.;..;.;; 






M r ; i \ \ ; : ; .' 


.5 






: ;; :|: : 




S7 • 
Q:/ 










: . } ' . ■ . ' ' ' i . '. '. 1 i 






i] 




:l : :: W 
(of 




. : - . . . 


: ... 




Frfc ^1t: 






:•:::: £/ 








: 


■ 












: : 






.3 










• : : : : 


:;':' :: : 


•»--■•••■ :■■•-* 






::::!/• 


:;;/<; / 






^ : Fit::: 








::- : !: : 






















:..: : : ! . 








2 


























" :: - \ : ; '. 
















































'*'*!.' 












::i: \::.' 






























° 




;:::: 


) 




. 




> 




5 


• 


\ 


5 



<\ 



Figure 8. SCS dimensionless unit hydrograph and mass curve from NEH-4) 



26 



Chapter 16 of NEH-4 suggests that the length of the time step, At, 
should not exceed 0.25 T to ensure a smooth flood hydrograph. 
Subroutine UH checks At against this criterion and prints a message 
warning of a possibly jagged hydrograph if At > 0.25 T . 

After making this check, the subroutine defines the dimensionless 
mass curve in discrete 5 percent steps of mass along with the corre- 
sponding normalized times (see Figure 9) . A check is made to determine 
the number of steps of user-specified length At there are in the total 
time span of the mass curve, which is 5 T . In DO loop 28 it is 
ensured that there are this many elements in the time step array T. 

In DO loop 12, a linear interpolation scheme is used to find mass 
curve ordinate values for each time step of user-specified length At. 
Each time step is divided by T before the interpolation is performed. 
Each ordinate value represents the (dimensionless) ratio of 
(instantaneous) cumulative flow to total cumulative flow (i.e., for the 
whole storm duration). In DO loop 16, the incremental differences 
between these ratios are found. These are the dimensionless ordinates 
of the unit hydrograph for a one inch pulse of rain occurring in a time 
period of duration At. To ensure that these "deltas" add up to one, 
they are normalized with respect to their sum. The dimensionless deltas 
are saved, and a set with units of cfs/in. are computed as well. The 
deltas with units of cfs/in. are those employed in subroutine ROUTE, 
which computes a flood hydrograph in cf s . 

Subroutine UH produces a line printer plot of the unit hydrograph 
by calling subroutine MAPA. This is a library subroutine on the system 
at Colorado State University. The DATA statement on line 10 of UH 
contains the titles used on this plot. Users on other systems should 
substitute a subroutine of their own, or simply delete the DATA, 
DIMENSION MT(8), and CALL MAPA statements and forgo plotting the unit 
hydrograph. 



27 



Qa 
Q 




Figure 9. Discretized version of SCS dimensionless mass curve used in 
subroutine UH. 



28 



Variable List 



FORTRAN Symbol 


Math Symbol 


Definition 


S 


S 


Watershed storage (in.). 


CN 


CN 


SCS curve number. 



LAGFLAG 



RATIOQ(I) 



NN 



Q a /Q 



Flag variable indicating whether t p 

is to be computed. If LAGFLAG = 0, 
t„ is computed from S, Y, and £. 

If LAGFLAG = 1 , t _ is specified by 
the user. 



TL 


T 


Lag time (hr) . 


L 


a 


Length to divide (ft). 


Y 


Y 


Average watershed slope (percent). 


TTP 


T 

p 


Time to peak (hr) . 


D 


D 


Length of SCS maximum recommended 
time step, 0.25 T (hr) . 



Ratio of instantaneous cumulative 
flow to total cumulative flow at 
'Ith' 5 percent step of total 
cumulative flow (see Figure 9). 



RATIO(I) 


t/T p 


Ratio of time at 'Ith' step to time 
to peak (T ). 


QQT(I) 


Q a /Q 


Ratio value interpolated from RATIOQ 
for a user specified time step. 


DELT 


At 


Length of user-specified time steps. 



Integer number of time steps of 

length At in a period equal to 

5 T . 
P_ 



XNN 


Real number of time steps of length 

At in a period of 5 T . 

P 


N 


Number of time steps of length At 
in storm being analyzed. 


NPLUS 


NPLUS=N+1; the lower index of DO 
loop 28. 



29 



Variable List (continued) 



FORTRAN Symbol 


Math 


Symbol 


Definition 


T(I) 






Array of times at the end of each 
step (hr) . 


IFLAG 






Counter used in loop 12 
interpolation scheme. 


TTTP 


t/T 
P 


Ratio of time at end of a user time 
step to time to peak (dimensionless) 


DELTA(I) 






Unit hydrograph ordinate for 'Ith' 
time step. 


SUMDEL 






Sum of unit hydrograph ordinates. 


DD(I) 






Dimensionless unit hydrograph 
ordinate for 'Ith' time steps. 


AREA 






Area of watershed in square miles. 



MAPA 



Colorado State University subroutine 
for producing a line printer data 
plot. 



3.4 Subroutine PONTIM: Determination of Ponding Time 
This routine calculates ponding time, given a pattern of variable 
rainfall intensity, according to the formula: 



P 3-1 r 



r . 
_1 _ 



j-l 

- I 
v=l 



r v ( vw 



K 



(3.4.1) 



where t is ponding time, t. is time at the end of 'jth' time step, r. 
is mean rainfall intensity for the time step being considered, S f is 
storage suction factor, and K is hydraulic conductivity at natural 
saturation. 

The formula is applied to successive time steps until a solution is 

reached, that is, the calculated t is less than t.. 

P J 



30 



For example, if j = 1, the equation reduces to 



t = + - 

P r 



1 







1 



- 1 



If 



t £ t-i > ponding time has been identified as falling in the first 



time step. If t > t, 
P 1 



t = t.. + 

P 1 



then 
S 



r 2 

— - 1 



is recalculated for j = 2 



- r ih 



K 



If t 1 < t < t„, ponding time has been identified as falling in time 
step two. If t > t„, the program proceeds to calculate t for 
j = 3. This process is repeated until a solution is reached. 

If r. < K, ponding cannot possibly take place, and the algorithm 
proceeds to calculations for the next step. 

In some cases it is found that t > t. but in the next 

P J 
calculation, for i + 1 , it is found that t < t. < t.^... Then ponding 

J P J J + l 

time is taken as t = t., but the rainfall producing ponding, r , is 

taken as r = r.^~. This happens when r . , .. is much greater than r.. 
P J+l FF J+l J 

The ponding time calculated by PONTIM is that used in calculations 
of post-ponding infiltration for variable intensity rainfall, which are 
carried out in subroutine PPINF. 



Variable List 



FORTRAN Symbol 


Math Symbol 


Definition 


KT 


K 


Hydraulic conductivity at natural 
saturation (in./hr). 


I 




Counter designating time step of 
consideration. 



SUMP 



j-l 



Sum of precipitation depths 



2 r (t -t 1 ) occurring in time steps previous to 
v=l that of consideration (in.). 



31 



Variable List (continued) 



FORTRAN Symbol 


Math Symbol 


Definition 


R(J) 


r . 
J 


Mean rainfall intensity during 'jth' 
time step (in./hr). 


T(J) 


t. 
J 


Time at the end of the 'jth' time 
step (hr) . 


PT(I) 




Ponding time calculated for 'ith' 
time step (hr) . 


SF 


s f 


Storage suction factor (in.). 


TP 


t 
P 


Ponding time (hr) . 


WP 


W 
P 


Cumulative infiltration (also rain 
fall) up to ponding time (in.). 


K 




Counter indicating last full time 
step before ponding time. 


RP 


r 
P 


Rainfall rate producing ponding 
(in./hr). 



3.5 Subroutine PPINF: Calculation of Post-Ponding Infiltration 
This subroutine picks up where PONTIM leaves off, calculating 

infiltration quantities by time steps following ponding time, according 

to the formula: 



W. = W + S(W ,6.) {Vt.-t +B - VB } + K(t.-t ) . (3.5.1) 
j p P i J P J p 

W. is the cumulative infiltration occurring up to the end of the 'jth' 
time step. t. is the time at the end of the 'jth' time step. S(W ,6.) 
is the rainfall sorptivity, defined by the equation: 



f 2K(S +W ) 2 

S( W= / Sf p < 3 - 5 - 2 > 

B is the quantity determined by the condition that at t = t , the 
infiltration capacity is equal to the rainfall rate, r . The equation 
for B is: 



32 



»■-* 



< s f + V 

KS(i -1) : 
1 K 



(3.5.3) 



Knowing the cumulative infiltration at the end of a time step, it 
is a simple matter to find the mean infiltration capacity for that time 
step. The cumulative infiltration for the previous time step is 
subtracted from that for the just ended time step, yielding the incre- 
mental quantity of infiltration occurring in the latest time step. This 
quantity, a depth of water, is divided by the duration of the latest 
time step to yield a mean infiltration capacity in inches per hour. To 
get an excess rainfall rate for the time step, the mean infiltration 
capacity is subtracted from the mean rainfall rate for that step. If 
the infiltration capacity is greater than the rainfall rate, then the 
infiltration rate which actually occurred is simply equal to the rain- 
fall rate, and the excess rainfall rate is zero. The cumulative 
infiltration occurring up to the end of the time step is revised to 
reflect the fact that infiltration was occurring at a rate less than 
capacity. After an excess rainfall pattern is computed for infiltration 
losses, 0.1 in. is removed from this (immediately after ponding), to 
account for surface retention losses. Lastly, subroutine ROUTE is 
called to generate a flood hydrograph from the excess rainfall pattern. 

Variable List 



FORTRAN Symbol 


Math Symbol 


Definition 


RSORP 


s ( w p> e.) 


1/2 
Rainfall sorptivity (in./hr ). 


SF 


s f 


Storage suction factor (in.). 


RP 


r 
P 


Rainfall rate producing ponding 
(in./hr). 



RSTARP 



KT 



K 



Normalized rainfall rate at ponding 
(r /K) . 



Hydraulic conductivity at natural 
saturation. 



33 



Variable List (continued) 



FORTRAN 


Symbc 


1 


Math Symbol 


Definition 


WP 






W 
P 


Cumulative infiltration (also 
rainfall) up to ponding time (in.). 


B 






B 


Term in Equation 3.5.1, used for 
convenience (hr) . 



K 



Counter passed from PONTIM 
indicating last full time step 
before ponding. 



M 



Index of the first full time step 
after ponding. 



N 



N 



Number of time steps in event. 



W(I) 



RE(I) 



W. 
J 



Cumulative infiltration occurring up 
to the end of the 'jth' time step 
(in.). 



DELW(I) 




Increment of infiltration occurring 
during time step I (in.). 


IR(D 




Mean infiltration rate occurring 
during time step I (in./hr). 


T(I) 




Time at the end of time step I (hr) . 


TP 


t 
P 


Ponding time (hr) . 


R(D 


r 


Rainfall intensity during time 
step I (in./hr). 



Excess rainfall rate during time 
step I, before retention is 
subtracted (in./hr). 



RET 



Retention depth (in.) 



PS 



Depth of excess rain in a time step 
from which retention is being 
subtracted (in. ) . 



RER(I) 



Excess rainfall rate after retention 
has been subtracted (in./hr). 



IFLAG 



Counter incremented for each time 
step after the onset of excess rain, 



34 



Variable List (continued) 



FORTRAN Symbol 



Math Symbol 



Definition 



DELP 



AP 



Depth of excess rain occurring in a 
time step (in.). 



NF 



Number of time steps after the onset 
of excess rain. The ultimate value 
of IFLAG. 



TM 




Array of time steps after the onset 
of excess rain (hr) . 


P 


P 


Total depth of rainfall in the 
entire event (in.). 


PE 


P 
e 


Cumulative excess precipitation 
depth (in.). 



3.6 Subroutine ROUTE: Calculation of a Flood Hydrograph 
This subroutine is called by subroutines PPINF, CONSTR AND SCS. It 
uses the unit hydrograph of subroutine UH to compute a flood hydrograph 
(in cfs) from excess rain patterns (in inches). This computation is 
done according to the formula: 



q(n) = I AP(j) S(n-j+l) for n = 1, 2, 



, MM 



(3.6.1) 



where q(n) is a flood hydrograph ordinate (cfs), AP(j) is an increment 
of excess rainfall (in.), 6(n-j+l) is an ordinate of the unit hydro- 
graph produced in UH, (cfs/in.), and MM is the sum of the number of 
(nonzero) unit hydrograph ordinates (NN) and of the number of steps of 
excess rain (NF) , minus 1, namely: MM = NN + NF -1. 

This is the number of time steps for which outflow will appear. 
The maximum MM that XSRAIN can handle is 150. 

The program sets equal to zero the excess rainfall steps for times 
(NF+1) through MM, and also the deltas for times (NN+1) through MM. 

A set of time steps (TM) is defined beginning at the onset of 
excess rain and running through step MM. Times and computed outflows 
are printed out. In addition, subroutine MAPA is called to give a 



35 



line-printer plot of the flood hydrograph. As noted in the summary for 
subroutine UH, MAPA is a library subroutine on the system at Colorado 
State University. Users on other systems should substitute a subroutine 
of their own. If no plot is desired, simply delete the statements DATA, 
DIMENSION MT(8), and CALL MAPA. 

Variable List 



FORTRAN Symbol 


Math Symbol 


Definition 


MM 




Total number of time steps for 
which there will be flow. 


NN 




Number of unit hydrograph ordinates. 


NF 




Number of steps of excess rain. 



TM(I) 



Set of times (hr) beginning with 
onset of runoff. The value of TM(1) 
gives the time elapsed between the 
onset of rain and the end of the 
first time step of runoff. 



NPLUS 



Counter used in assigning zero 
values to portions of DELP and 
DELTA arrays. 



DELP 


AP 


Steps of excess rainfall (in.). 


DELTA 


6 


Ordinate of unit hydrograph in 
(cfs/in. ) . 


QA 


q 


Flood hydrograph ordinates (cfs). 


MAPA 




CSU library subroutine to give a 
line-printer data plot. 



3.7 Subroutine CONSTR: Post-Ponding Infiltration with Assumed 
Constant Rainfall 

This subroutine treats the event specified by the user as one of 

uniform rainfall intensity. It calculates ponding time, post-ponding 

infiltration and a pattern of excess rainfall. The purpose of the 

subroutine is to demonstrate the very different pattern cf excess 

rainfall one obtains with constant rainfall assumed as compared to that 



36 



arrived at with a variable rainfall event. This can make a big 
difference when the results are used to compute a flood hydrograph for 
a watershed. 

The constant rainfall rate is first calculated: 

r = f- (3.7.1) 

D 

Sorptivity for a constant rainfall event is slightly different from 
that for a variable rainfall event: 

S(6 ) = V2KS f . (3.7.2) 

The normalized rainfall rate, r*, is computed: 

r* = - . (3.7.3) 

K 

Ponding time is computed by the Mein and Larson formula: 

S f 
t = , * . (3.7.4) 

p r(r--l) 

No successive solution for ponding time is required since the rainfall 
intensity is the same for every time step. The quantity infiltrated up 
to ponding is then simply: 

W = rt . (3.7.5) 

P P 

Post-ponding infiltration is computed by the formula 



W. = W + S(6.) (-4— r) (Vt.-t +B - VB } + K(t.-t ) . (3.7.6) 
j p i y v r--r iy j p J P 

W. is the cumulative infiltration at the end of time step j. B is 
the quantity, for a constant rainfall event, determined by the condition 
that ai 
namely: 



that at t = t , the rainfall rate equals the infiltration capacity, 



t j. 3 
B = 2 E( r^I ) (3 - 7 ' 7) 

Incremental values of infiltration are computed for each time step from 
the cumulative values, and these increments of infiltration are divided 



37 



by the length of the time steps to get mean infiltration capacities for 
each time step. As in PPINF, excess rainfall rates are found for each 
step by subtracting the mean infiltration capacity from the mean rain- 
fall rate. If the infiltration capacity exceeds the rainfall rate, the 
actual infiltration rate occurring is simply taken as the rainfall rate 
itself, and the cumulative infiltration is adjusted to reflect this. 
After an excess rainfall pattern is computed for infiltration losses, 
0.1 in. is removed from this (immediately after ponding), to account for 
surface retention losses. An array of increments of excess rainfall 
depths (DELP) is computed for use by the subroutine ROUTE, which 
produces a runoff hydrograph. Finally, a mass balance check is made and 
ROUTE is called. 

Variable List 



FORTRAN Symbol 


Math Symbol 


Definition 


CR 


r 


Constant rainfall rate (in./hr). 


P 

/ 


P 


Cumulative precipitation for entire 
event (in. ) . 


TD 


*D 


Duration of rain (hr) . 


SORP 


s(e.) 


1/2 
Sorptivity (in./hr ). 


KT 


K 


Hydraulic conductivity at natural 
saturation (in./hr). 


SF 


S f 


Storage suction factor (in.) 


RSTAR 


r* 


Normalized rainfall rate. 


TP 


t 
P 


Ponding time (hr) . 


KK 




Counter indicating last full time 
step before ponding. 


RATIO 


( r*-l> 


Self explanatory; a convenience 
term. 


WP 


w 
p 


Cumulative infiltration (and 
rainfall) up to ponding (in.). 


W(I) 


w. 
J 


Cumulative infiltration at end of 
time step I (in. ) . 



38 



Variable List (continued) 



FORTRAN Symbol 


Math Symbol 


Definition 


T(I) 


t. 
J 


Time at end of time step I (hr) . 


B 


B 


Term in Eq. (3.7.6) (hr) . 


DELW(I) 




Increment of infiltration (in.). 


IR(D 




Mean infiltration rate in time 
step I (in./hr). 


RE(I) 




Mean excess rainfall rate in time 
step I (in./hr) . 


PECONS 




Cumulative excess precipitation for 
a constant rainfall event (in.). 


RET 




Surface retention depth (in.). 


RER(I) 


> 


Excess rainfall rate after retention 
has been subtracted (in./hr). 


DELP 




Array of increments of excess 
precipitation; used by ROUTE (in.). 


DELT 


At 


Length of a time step (hr) . 


IFLAG 




Counter used to add up the number 
of steps of excess rainfall. 


M 




The index of the first full time 
step after ponding. 


N 




The total number of time steps in 
the rainfall event. 


NF 




The number of steps of excess 
rainfall. 


PS 




Increment of excess rainfall from 
which retention is subtracted. 



TM 



Array of time steps beginning with 
onset of excess rainfall after 
retention is subtracted. This is 
the time set used to compute a flood 
hydrograph (hr) . 



39 



3.8 Subroutine SCS: Excess Rainfall by the SCS Method 
This subroutine uses the SCS approach for finding excess rainfall 
for both variable and constant rainfall events. If main options 2 or 3 
are elected, the curve number is modified according to season and five 
day antecedent rainfall. May through September is taken as the growing 
season. Criteria for AMC types I and III are those presented in 
Table 4.2 of NEH-4, presented here in Table 4. Curve numbers are 
computed for AMC I and III, if criteria dictate, by the Sobhani (1976) 
equations: 



CN 

rw = _ 

I 2.334 - 0.01334 CN 



(3.8.1) 



II 



CN 



CN 



II 



III 0.4036 + 0.0059 CN 



(3.8.1) 



II 



These equations match the values of NEH-4, Table 10.1, within ± 1 CN. 
Table 10.1 is reproduced in the Appendix as Table A2. 

Table/ 4. Seasonal rainfall limits for AMC (after NEH-4). 



AMC Group 



Total 5-day Antecedent Rainfall 



Dormant Season 



Growing Season 



I 

II 

III 



Inches 
Less than 0.5 
0.5 to 1.1 
Over 1.1 



Inches 
Less than 1.4 
1.4 to 2.1 
Over 2.1 



The variable rainfall case is addressed first. Starting with the 

first step, cumulative depth of rain up to that time is compared with 

the initial abstraction (I = 0.2 S) and if it is less than I , the 

a a' 

program records all rain as having infiltrated, and skips to the next 

time step. If cumulative rainfall exceeds I , cumulative infiltration 
r a' 

is computed by the equation 



40 



(P. -I ) 2 

W j ■ P j - P. - 3 8 S »- 8 - 3 > 



where W. is the cumulative infiltration through time step 'j', and P. 
is the cumulative precipitation through time step 'j'. 

As in PPINF and CONSTR, increments of infiltration are computed 
from the cumulative values, and these in turn are divided by the length 
of their respective time steps to get mean infiltration capacities. 
Mean excess rainfall rates are equal to the mean rainfall rates minus 
their respective mean infiltration capacities. If mean infiltration 
capacity should exceed the rainfall rate for a time step, the infiltra- 
tion rate for the step is taken as equal to the rainfall rate for that 
step. In such a case, cumulative infiltration is revised down to 
maintain mass balance. Finally, steps of incremental excess rainfall 
depth are computed and subroutine ROUTE is called to compute a flood 
hydrograph. 

The program next turns to the case of the constant rainfall rate 
storm, and redefines the steps of cumulative precipitation accordingly. 
It then passes through the same algorithm as for the variable rainfall 
case to produce a pattern of excess rainfall and a flood hydrograph. 

Variable List 

FORTRAN Symbol Math Symbol Definition 

AMC AMC Antecedent moisture condition, for 

SCS, the sum of rainfall depths for 
the five previous days (in.). 

AR(1) Depth of rain falling on 5th day 

previous (in.). 

AR(2) Depth of rain falling on 4th day 

previous (in.). 

AR(3) Depth of rain falling on 3rd day 

previous (in.). 

AR(4) Depth of rain falling on 2nd day 

previous (in.). 

AR(5) Depth of rain falling on 1st day 

previous (in.). 



41 



Variable List (continued) 



FORTRAN Symbol 


Math Symbol 


Definition 


MO 




Month (1-12). 


CN 


CN 


Curve number. 



IFLAG 



PESCS 



Flag variable distinguishing 
between constant and variable rain 
computations . 



s 


s 


SCS watershed storage parameter 
(in.). 


IA 


I 
a 


Initial abstraction (in.). 


CUMP(I) 




Cumulative rainfall through step I 
(in.). 


W(I) 


W 


Cumulative infiltration through 
step I (in.). 


DELW(I) 




Incremental infiltration in step I 
(in.). 


T(I) 




Time at end of step I (hr) . 


IR(I) 




Mean infiltration rate in step I 
(in./hr). 


R(D 




Mean rainfall rate in step I 
(in./hr). 


RE(I) 




Mean excess rainfall rate in step I 
(in./hr). 


P 


P 


Cumulative rainfall depth for entire 
event (in. ) . 


TD 


fc D 


Duration of rain (hr) . 



Depth of cumulative excess 
precipitation for entire event by 
the SCS method (in.). 



CR 



R 



Constant rainfall rate, r = P/t, 
(in./hr). 



DELP 



Array of increments of excess rain; 
used by ROUTE (in.). 



42 



Variable List (continued) 



FORTRAN Symbol 


Math Symbol 


Definition 


DELT 


At 


Length of a time step (hr) . 


I COUNT 




Index used to count the number of 
steps of excess rain (DELP) . 


N 




The total number of time steps in 
the rainfall event. 


NF 




The number of time steps with excess 
rain occurring. 



TM 



Set of time steps beginning with 
onset of excess rainfall used in 
ROUTE (hr). 



3.9 Subroutine TABLE: Computation of Hydraulic Soil Parameters 
from Curve Number 

This subroutine computes hydraulic conductivity, K (in./hr), and 

storage suction factor at field capacity, (S f ) f (in.), given a curve 

number (CN) . Hydraulic conductivity is computed directly from a 

regression equation which has CN as its only unknown. The storage 

suction factor is found in two steps. First, the sorptivity at field 

capacity, S(0 f ), is found directly from a regression equation in CN. 

Then, (S f ) f is found by the following equation: 

,2 



< S f>fc 



[S(8 fc )] 

2K 



(3.9.1) 



This is simply a rearrangement of the equation defining sorptivity: 

(3.9.2) 



S(8.) = V2KS^ 
i f 



The particular regression equations used to find K depend upon 
the CN. These equations are: 



g _ (100-CN) 



CN > 75 



315.43 ' 
K = 1.236 - 0.0154 CN, 36 < CN < 75 

K = 1.853 - 0.0324 CN, CN < 36 



(3.9.3) 
(3.9.4) 
(3.9.5) 



43 



The equations for sorptivity are: 

cffl ^ ■ (100-CN) 
blb fc J " 42.252 > 



CN > 65 



S(6 X ) = 1.191 - 0.00575 CN, CN < 65 
fc — 



(3.9.6) 
(3.9.7) 



There is no bias in Equations (3.9.3) through (3.9.7) due to 
assumed constant rainfall rate in establishing the CN - (K, S,.) 
correspondence. Earlier versions of these equations contained such a 
bias, but they have since then been corrected. 



Variable List 



FORTRAN Symbol 


Math Symbol 


Definition 


CN 


CN 


SCS watershed curve number. 


KT 


ic 


Hydraulic conductivity (in./hr). 


SORP 


so fc ) 


Sorptivity at field capacity 
(in./hr 1/2 ). 



SFFC 



< S f>fc 



Storage suction factor at field 
capacity soil moisture content 
(in.). 



3. 10 Subroutine BALANCE: Formation of Corps of Engineers 
"Balanced Hyetograph" 

This subroutine takes a set of input steps of rainfall (either in 

in. or in./hr) and rearranges them into a "balanced hyetograph" as used 

in U.S. Army Corps of Engineers practice (see reference number 3, 

page 3-02). 

The algorithm begins in DO loop 40 by arranging the rainfall 
array so the pulse of greatest magnitude is the first element, that of 
second greatest magnitude is the second element, etc. Next, in DO 
loop 90, the steps of rainfall are rearranged to that the greatest is 
the central element, the second greatest occurs just before it, the 
third greatest occurs just after it, the fourth greatest occurs just 
before the second greatest, and so on. This is the form of the 
"balanced hyetograph." 



44 



Variable List 



FORTRAN Symbol 


Math 


Symbol 




Definit 


:ion 






N 






Number of 


steps of 


rainfall 


• 




R 


] 


r 


Array of 
in. or in 


rainfall s 
./hr. 


iteps, ei 


ther 


in 


CHECK 






Comparison variable 


i 






I CHECK 






Index of 
rainfall. 


the 'Ith 1 


largest 


step 


of 



BR 



Intermediate array of rain steps 
where BR(1) is greatest, BR(2) is 
next greatest, etc. (in. or in./hr) 



CTR 



Index of center element of R array 
which is of greatest magnitude in 
a "balanced hyetograph." 



4. Illustrative Examples 

4. 1 Main Option One 

Suppose a small watershed in central Oklahoma is under 
investigation. Study of soil maps show 36 percent of the area char- 
acterized by soils of hydrologic group D and the remaining 64 percent by 
group B. The land use is pasture. The watershed has a past history of 
overgrazing and has suffered from erosion due to this practice, 
suggesting a classification of poor hydrologic condition. Consulting 
Table 1 (NEH-4, Table 9.1) shows a curve number of 89 for areas of soil 
group D and 79 for soil group B. The composite CN is found by 
weighting by area: 

CN = 0.36(89) = 0.64(79) = 82.6 

Next the table of correspondence (Table Al) is consulted to determine 

infiltration parameters. Interpolating values it is found that 

K = 0.055 in./hr and (Sj r = 1.537 in. 

f fc 

Maps and air photos are studied to determine the watershed 
characteristics required as inputs for the SCS dimensionless unit hydro- 
graph procedures. The area is 14 acres, or 0.03 square miles. The lag 
time will be estimated by Equation (3.3.1), within subroutine UH. The 



45 



length to the divide from the basin outlet is 1,100 ft. The average 
watershed slope is estimated from contours to be 8 percent. 

During the event of interest, 3.0 in. of rain fell on the watershed 
in 8.0 hr. The time distribution is unknown, so a Huff distribution 
will be imposed. Table 3 suggests a storm of 8.0 hr duration would 
likely fall in the second-quartile category. A time step of 20 min is 
elected. 

All the necessary inputs are now available for running XSRAIN with 
option one. Data cards are prepared in the following manner: 

Input Description for XSRAIN, Main Option One 



Card 


Field 


Columns 


Math 
Symbol 


FORTRAN 
Symbol 


Format 


Description 


1 


1 


1 




OPTION 


11 


Main Option of XSRAIN 
elected 



1 


1,2 


2 


3,4 


3 


5,6 



SUB0PT1 12 Suboption 1 (see Sec. 2.5) 

2X 
SUB0PT2 12 Suboption 2 (see Sec. 2.6) 



1-10 K KT F10.3 Hydraulic conductivity at 

natural saturation 
in./hr) 

11-20 ( s f ) f SFFC F10.3 Storage suction factor at 

field capacity (in.) 

21-30 P P F10.3 Cumulative depth of 

precipitation (in.) 

F10.3 Duration of storm (hr) 

F10.3 SCS curve number 



4 


30-41 


fc D 


TD 


5 


41-50 


CN 


CN 


1 


1 




LAGFLAG 



II If LAGFLAG = 0, t_ (hr) 

is computed by Eq. (3.3.1) 

If LAGFLAG = 1 , t^ is 
specified by user. 



46 



Input Description for XSRAIN, Main Option One (continued) 

Math FORTRAN 
Card Field Columns Symbol Symbol Format Description 

If LAGFLAG = 0, Card 5 has the following format: 

1 1-10 AREA F10.2 Watershed area (square) 

miles 

5 2 11-20 £ L F10.2 Length to divide (ft) 

3 21-30 Y Y F10.2 Average watershed slope 

(percent) 

If LAGFLAG = 1, Card 5 has the following format: 

1 1-10 AREA F10.2 Watershed area (sq. mi.) 
5 

2 11-20 t. TL F10.2 Lag time (hr) 

11 Q Q II Huff quartile chosen 

(1, 2, 3 or 4) 

6 2 2,3 2X Two blank columns 

3 4-13 At DELT F10.1 Time step chosen (min) 



The coding sheet for these data is shown as Figure 10. 

A copy of the results printed out by XSRAIN for the example is 
presented in Exhibit 1. It should be noted that in the tabulated output 
of subroutine PPINF, the first time listed is ponding time, and the 
values in the W and DELW columns are the cumulative infiltration at 
ponding, W . It is understood that IR = R = RP (the ponding rainfall) 
and that the excess rainfall rate, RE, is equal to zero. 

Note that in the output of subroutine UH there is a warning given 
that the user-specified time step is greater than 0.25 T (T is the 
time to peak). This condition may yield a jagged, discontinuous 
hydrograph. In this example, however, the flood hydrograph is seen to 
be smooth in spite of this. 



47 



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48 



Exhibit 1. Output of XSRAIN for example of Main Option One. 

MAIN OPTION CHOSEN IS 1 



IF SU60PT1 = 1. ONLY INFILTRATION ApPROACH IS USED WITH VARIABLE RAINFALL RATES 

IF SU8UPT1 = 4. HYDROGRAPHS ARE DERIVED WITH FOUR OIFFERENT MEANS OF CALCULATING EXCESS RAIN 



IF SUB0PT2 = Oi 
IF SU80PT2 s It 



USER INPUTS KT AND sFFC 

KT AND SFFC ARE COMpUTED FROM CN 



SUB OPTION 1 s 1 



SUB OPTION 2=0 



HYDRAULIC CONDUCTIVITY. KT ■■ , .055 IN/HR 
STORAGE SUCTION FACTOR AT FIELD CAP&CITY. SFFC 
TOTAL PHECIP. P= 3.000 IN 
DURATION TIME. TO * 8.000 HR 
CURVE NUMBER. CN s 82.6 



1.537 IN 



IF LAGFLAG = 0. LAG TIME IS COMPUTED IN SUBROUTINE UH 
IF LAGFLAG = 1. LAG TIME IS PROVIDED BY THE USER 

LAGFLAG a 



AREA= .03 SO MI 

LENGTH TO DIVIDE" 1100.00 FT 
HUFF UUARTILE* 2 TIME STEP" 



AVG WATERSHED SLOPE 
20.0MIN 



8.00 PERCENT 



OUTPUT OF SUBROUTINE HUFF 
HUFF HYETOGRAPH 



TIME (HR) 



.333 
.667 
1.000 
1.333 
1.667 
2.000 
2.333 
2.667 
3.000 
3.333 
3.667 
4.000 
4.333 
4.667 
5.000 
5.333 
5.667 
6.000 
6.333 
6.667 
7.000 
7.333 
7.667 
a. 000 



CUMULATIVE PRECIP (IN) 

.038 

.075 

.165 

.290 

.435 

.660 

.885 

1.150 

1.425 

1.685 

1.923 

2.160 

2.348 

2.535 

2.655 

2.730 

2.798 

2.835 

2.873 

2.900 

2.925 

2.950 

2.975 

3.000 



RAINFALL INTENSITY (IN/HR) 

.113 
.113 
.270 
.375 
.435 
.675 
.675 
.795 
.825 
.780 
.713 
.712 
.563 
.562 
.360 
.225 
.203 
.113 
.112 
.083 
.075 
.075 
.075 
.075 



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OUTPUT OF SUBROUTINE UH 

USE* TIME STEP OF .333 HR IS GREATER THAN 0.25 TIME TO PEAK' WHICH IS 
RESULTING HYDROGRAPH MAY BE JAGGED 

WATERSHED LAG TIME = .112HR 
TIME TO PEAK= .278HR 



.070 HR 



UNIT HYDROGRAPH 
TIME(HR) ORDINATES IN (CFs/IN) 



.333 
.667 

l.ooo 

1.333 
1.667 



30.42 

23.43 

2.52 

1.45 

.25 



DIMENSIONLESS ORDINATES 

.524 
.404 
.043 
.025 
.004 



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51 



Exhibit 1. (continued) 



DATA USED TO COMPUTE FLOOD HYDROGRAPh! 

T(HR) = TIME IN HOURS 

DELP(IN) = INCREMENTAL DEPTH OF EXCpSS RAINFALL 

DELTA(CFSZIN) = UNIT HYDROGRAPH ORDINATE 



HR) 


DELP(IN) 


DELTA(CFS/I 


2.000 


.068 


30.424 


2.333 


.140 


23.435 


2.667 


.167 


2.5i7 


3.000 


.202 


1.450 


3.333 


.191 


.251 


3.667 


.171 


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4.000 


.174 


O.OflO 


4.333 


.126 


o.Ono 


4.667 


.128 


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5.000 


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O.OoO 


5.333 


.019 


O.OoO 


5.667 


.013 


O.OoO 


6.000 


0.000 


o.Ono 


6.333 


0.000 


O.OnO 


6.667 


0.000 


o.Ono 


7.000 


0.000 


O.OoO 


7.333 


0.000 


O.OoO 


7.667 


0.000 


O.OoO 


8.000 


0.000 


O.OoO 


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0.000 


O.OoO 


8.667 


0.000 


0.000 


9.000 


0.000 


O.OoO 


9.333 


0.000 


O.OoO 


OOD HYDROGRAPH 




TIME(HR) 




Q(CFS) 


a. 000 




2.0a 


2.333 




5.87 


2.667 




9.14 


3.000 




10.97 


3.333 




11.21 


3.667 




10.49 


4.000 




10.12 


4.333 




6.67 


4.667 




7.58 


5.000 




5.50 


5.333 




2.57 


S.667 




1.19 


6.. 000 




.46 


6.333 




.07 


6.667 




.02 


7.000 




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7.333 




0.00 


7.667 




0.00 


8.000 




0.00 


8.333 




0.00 


8.667 




0.00 


9.000 




0.00 


5.333 




0.00 



52 



* * * 



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53 



4.2 Main Option Two 

In this example, the same problem as posed in Section 4.1 will be 
solved, with the difference that this time the influences of season and 
five day antecedent rainfall will be taken into account. The rainfall 
event occurred on September 29 and was preceded by 0.25 in. of rain 
4 days earlier. This means that: 

MO = 9 

DAY = 29 

AR(1) = 0.0, AR(2) = 0.25, AR(3) = 0.0, AR(4) = 0.0, AR(5) = 0.0 

It will be left to XSRAIN to determine the hydraulic conductivity, 
K, and storage suction factor, (S f ) f , from the curve number. Hence, 
SUB0PT2 =1. In addition, a lag time will be specified from a study of 
the basin's geomorphology and channel characteristics. That estimate of 
lag time is 1.2 hr. It follows then that LAGFLAG is set equal to 1. 
Data cards should be of the following format. 

Input Description for XSRAIN, Main Option Two 



Card 


Field 


Columns 


Math 
Symbol 


FORTRAN 
Symbol 


Format 


Description 


1 


1 


1 




OPTION 


11 


Main Option of XSRAIN 
elected 



1 1,2 

2 3,4 

3 5,6 



SUB0PT1 12 Suboption 1 (see Sec. 2.5) 

2X 
SUB0PT2 12 Suboption 2 (see Sec. 2.6) 



1-10 P P F10.3 Cumulative depth of 

precipitation (in.) 



2 


11-20 


fc D 


TD 


3 


21-30 


CN 


CN 


1 


1 




LAGFLAG 



F10.3 Duration of storm (hr) 
F10.3 SCS curve number 



II If LAGFLAG =0, t £ (hr) 

is computed by Eq. (3.3.1) 
If LAGFLAG = 1 , t £ is 
specified by user. 



54 



Input Description for XSRAIN, Main Option Two (continued) 



Math FORTRAN 
Card Field Columns Symbol Symbol Format 



Description 



If LAGFLAG 
1 

5 2 
3 



0, Card 
1-10 

11-20 
21-30 



5 has the following format: 
AREA 



F10.2 Watershed area (square) 
miles 

F10.2 Length to divide (ft) 

F10.2 Average watershed slope 
(percent) 



If LAGFLAG 

1 
5 

2 



1, Card 
1-10 

11-20 



5 has the following format: 

AREA F10.2 Watershed area (square 



TL 



mile) 
F10.2 Lag time (hr) 



2,3 
4-13 



At 



DELT 



II Huff quartile chosen 
(1, 2, 3 or 4) 

2X Two blank columns 

F10.1 Time step chosen (min) 



1,2 

2,3 
5,6 



MO 



DAY 



12 Month in which storm 
occurs (1-12) 

2X Two blank columns 

12 Day of the month on which 
storm occurs (1-31) 



1-10 

11-20 

21-30 

31-40 

41-50 



AR(1) F10.3 Depth of rain fallen 
5 days previous (in.) 

AR(2) F10.3 Depth of rain fallen 
4 days previous (in.) 

AR(3) F10.3 Depth of rain fallen 
3 days previous (in.) 

AR(4) F10.3 Depth of rain fallen 
2 days previous (in.) 

AR(5) F10.3 Depth of rain fallen 
1 day previous (in.) 



55 



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58 



Exhibit 2. (continued) 



OUTPUT OF SUBROUTINE UH 

WATERSHED LAG TIME a 1.200HR 
TIME TO PEAK- 1.367HR 



UMIT HYOROGRAPH 
TIME(HR) OROINATES IN (CFs/IN) 



OIMENSIONLESS OROINATES 



.333 
.667 
1.000 
1.333 
1.667 
2.000 
2.333 
2.667 
3.000 
3.333 
3.667 
4.000 
4.333 
4.667 
5.000 
5.333 
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6.000 
6.333 
6.667 
7.000 



1.51 

1.79 

6.76 

10.60 

10.55 

8.10 

6.21 

4.36 

2.70 

1.57 

1.14 

.30 

.30 

.30 

.30 

.30 

.30 

.30 

.30 

.30 

.15 



.026 
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.116 
.182 
.182 
.140 
.107 
.075 
.046 
.027 
.020 
.005 
• 005 
.005 
.005 
.005 
.005 
.005 
.005 
.005 
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59 



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61 



Exhibit 2. (continued) 



DATA USED TO COMPUTE FLOOD HYDROGRAPhJ 

T(HR> = TIME IN' HOURS 

DELP(IN) = INCREMENTAL OEPTH OF EXCfSS RAINFALL 

DELTA(CFS/IN) « UNIT HYOROGRAPH ORDINATE 

T(HR) DELP(IN) DELTA(CFS/IN) 

2.333 .106 1.5o7 

2.667 .162 1.795 

3.000 .179 6.756 

3.333 .170 10.596 

3.667 .153 10.546 

4.000 .156 B.lr>2 

4.333 .110 6.2o7 

4.667 .113 4.356 

5.000 .047 2.696 

5.333 .005 1.574 

5.667 0.000 1.139 

6.000 0.000 .295 

6.333 0.000 .295 

6.667 0.000 .295 

7.000 0.000 .295 

7.333 0.000 .295 

7.667 0.000 .295 

8.000 0.000 .295 

8,333 0.000 .295 

B.667 0.000 .295 

9.000 0.000 .I48 

9.333 0.000 O.OnO 

9.667 0.000 O.OnO 

10.000 0.000 O.OnO 

10.333 0.000 O.OnO 

10.667 0.000 O.OnO 

11.000 0.000 O.OnO 

11.333 0.000 O.OnO 

11.667 0.000 O.OnO 

12.000 0.000 O.OnO 

12.333 0.000 O.OnO 

12.667 0.000 O.OnO 

13.000 0.000 O.OnO 

13.333 0.000 O.OnO 

13.667 0.000 O.OnO 

14.000 0.000 O.OnO 

14.333 0.000 O.OnO 

14.667 0.000 O.OnO 



62 



Exhibit 2. (continued). 

FLOOD HYDROGRAPH 

TIME(HR) O(CFS) 

2.333 .16 

2.667 .43 

3.000 1.28 

3.333 2.79 

$. 667 4.58 

4.000 6.12 

4.333 7.14 

4.667 7.75 

5.000 7.76 

8.333 7.34 

5.667 6.49 

6.000 5.20 

6.333 3.79 

6.667 2.60 

7.000 1.72 

7.333 1.12 

7.667 .72 

8.000 .52 

0.333 .40 

8.667 .36 

9.000 .34 

9.333 .30 

9.667 .25 

10.000 .20 

10.333 .15 

10.667 .10 

11. 000 .06 

11.333 .03 

11.667 .01 

12.000 .00 

12.333 0.00 

12.667 0.00 

13.000 0.00 

13.333 0.00 

13.667 0.00 

14.000 0.00 

14.333 0.00 

14.667 0.00 



63 



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64 



4.3 Main Option Three 

In this example, the same problem introduced in the example for 
Main Option One will be treated. The seasonal and antecedent rainfall 
data and the lag time estimate of Main Option Two will be used as well. 
The fact that a Huff time distribution of rainfall is replaced with a 
user-specified set of rainfall increments is what makes this example 
different from the example of Main Option Two. For this specific case, 
the rainfall steps will be rearranged into a "balanced hyetograph," but 
this is not a requirement under Main Option Three. It is possible to 
have the user-specified rainfall used "as is." 

It should be noted that any set of rainfall steps specified under 
Main Option Three (or Four) must correspond to a set of equal length 
time steps. This is required for compatibility with the unit hydrograph 
used for routing of excess rainfall. 

XSRAIN is set up to handle a user-specified rainfall pattern of up 
to 100 steps. If it is desired to use the program with more steps, 
changes in the coding have to be made. See Section 4.5. 

The rainfall pattern for this example is tabulated below. In this 
case N = 32. 





[ 


1 


2 


3 


4 


5 


6 


7 


8 


9 


10 


11 


12 


13 


14 


15 


16 


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hr 


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in. 


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18 


19 


20 


21 


22 


23 


24 


25 


26 


27 


28 


29 


30 


31 


32 


T(I) 


hr 


4.25 


4.50 


4.75 


5.00 


5.25 


5.50 


5.75 


6.00 


6.25 


6.50 


6.75 


7.00 


7.25 


7.50 


7.75 


8.00 



R(I) in. .40 .35 .25 .08 .08 .07 .07 .03 .03 .03 .02 .02 .02 .02 .02 ■ .01 



Since a "balanced hyetograph" will be formed from the R(I) values, 
they could have been entered in any order. There is nothing special 
about the order that is presented. Although in this case the R(I) 
values are input as depths (in.) and the times are input in hours, they 
could have been read in as rates (in./hr) and minutes if it had been so 
desired. The program distinguishes between the various units by means 
of flag variables. They are PFLAG and TFLAG. 



65 



If PFLAG = 0, input rain is in inches/hour. 

If PFLAG = 1, input rain is in inches. 

If TFLAG = 0, time is input in minutes. 

If TFLAG = 1, time is input in hours. 

In addition, the flag variable CFLAG is used to determine whether a 
"balanced hyetograph" is to be formed or if the user rainfall steps are 
to be used "as is." 

If CFLAG = 0, user time distribution is used "as is." 
If CFLAG = 1, a "balanced hyteograph" is formed. 

Input Description for XSRAIN, Main Option Three 

Math FORTRAN 
Card Field Columns Symbol Symbol Format Description 

1 1 1 OPTION II Main Option XSRAIN elected 

SUB0PT1 12 Suboption 1 (see Sec. 2.5) 

2X 
SUB0PT2 12 Suboption 2 (see Sec. 2.6) 

1 ;L-10 P P F10.3 Cumulative depth of 

precipitation (in.) 

3 2 11-20 t„ TD F10.3 Duration of storm (hr) 
3 21-30 CN CN F10.3 SCS curve number 

4 1 1 LAGFLAG II If LAGFLAG = 0, t £ (hr) 

is computed by Eq. (3.3.1) 
If LAGFLAG = 1, t„ is 
, specified by user. 

If LAGFLAG = 0, Card 5 has the following format: 

1 1-10 AREA F10.2 Watershed area (square) 

miles 

5 2 11-20 2 L F10.2 Length to divide (ft) 

3 21-30 Y Y F10.2 Average watershed slope 

(percent) 



1 


1,2 


2 


3,4 


3 


5,6 



66 



Input Description for XSRAIN, Main Option Three (continued) 



Math FORTRAN 
Card Field Columns Symbol Symbol Format 



Description 



5 has the following format: 

AREA F10.2 Watershed area (square 



If LA( 


5FLAG 


= 1, Car 




1 


1-10 


5 








2 


11-20 



TL 



mile) 
F10.2 Lag time (hr) 



1,2 

3,4 
5,6 



MO 



DAY 



12 Month in which storm 
occurs (1-12) 

2X Two blank columns 

12 Day of month on which 
storm occurs (1-31) 



1-10 



11-20 



21-30 



31-40 



41-50 



AR(1) F10.3 Depth of rain fallen 
5 days previous (in.) 

AR(2) F10.3 Depth of rain fallen 
4 days previous (in.) 

AR(3) F10.3 Depth of rain fallen 
3 days previous (in.) 

AR(4) F10.3 Depth of rain fallen 
2 days previous (in.) 

AR(5) F10.3 Depth of rain fallen 
1 day previous (in.) 



1-3 



N 



N 



2 


4,5 


3 


6 


4 


7,8 


5 


9 



PFLAG 



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10,11 
12 



TFLAG 



13 Number of time steps 
specified by user 

2X Two blank columns 

II Flag indicating units of 
user input rainfall steps 

2X Two blank columns 

II Flag determining whether 
a "balanced hyetograph" 
should be formed 

2X Two blank columns 

II Flag indicating units of 
user input time steps 



67 



Input Description for XSRAIN, Main Option Three (continued) 

Math FORTRAN 
Card Field Columns Symbol Symbol Format Description 

1 1-10 t T(l) F6.3 Time (min or hr) at end of 

1st time step 



9-18- 



10 91-100 t T(10) F6.3 Time (min or hr) at end of 

10th time step 



1-10 r R(l) F6.3 Rainfall rate (in./hr or 



in.) in 1st time step 



19-28* • 



10 91-100 r R(10) F6.3 Rainfall rate (in./hr or 

in.) in 10th time step 

^'Number of cards depends on number of time steps of rainfall specified by 
user. Program is set up to take as many as 100 time steps. 



68 



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73 



Exhibit 3. (continued). 



DATA USEO TO COMPUTE FLOOD HYDROGRAPhJ 

T (HH) = TIME IN HOURS 

DFLP(IN) = INCREMENTAL DEPTH OF EXCESS RAINFALL 

DELTA (CFS/IN) = UNIT HTDROGRAPH ORDINATE 

DELTA (CFS/IN) 

1.55* 

1.55* 

3.623 

7.6ft7 

10.643 

12.3?* 

9. I28 

7.689 

6.220 

4.856 

3. 231 

2.1A* 

1.623 

1.3-33 

.30* 

.30* 

.30* 

.30* 

.30* 

.30* 

.30* 

.30* 

.30* 

.30* 

.30* 

.3o* 

.152 

O.OoO 

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O.OoO 
O.OoO 
O.OoO 
O.OoO 
O.OoO 

0.O0O 
0.O00 

O.OoO 



(HR) 


DELP(IN) 


3.750 


.086 


4.000 


.292 


4.250 


.405 


4.500 


.264 


4.750 


.170 


5.000 


.125 


5.250 


.009 


5.500 


.002 


5.750 


0.000 


6.000 


0,000 


6.250 


0.000 


6,500 


0.000 


6.750 


0.000 


7.000 


0.000 


7.250 


0.000 


7.500 


0.000 


7.750 


0.000 


8.000 


0.000 


8.250 


0.000 


8.500 


0.000 


8.750 


0.000 


9.000 


0.000 


9.250 


0.000 


9.S00 


0.000 


9.750 


0.000 


10.000 


0.000 


10.250 


0.000 


10.500 


0.000 


10.7^0 


0.000 


11.000 


0.000 


11.250 


0.000 


11.500 


0.000 


11.750 


0.000 


12.000 


0.000 


12.25U 


0.000 


12.500 


0.000 


12.750 


0.000 


13.000 


0.000 


13.250 


0.000 


13.500 


0.000 


13.750 


0.000 


14.000 


0.000 


14.250 


0.000 


14.500 


0.000 



74 



Exhibit 3. (continued). 



flood i 


■IYDROGKAPH 


TImE(mr) 


3.750 


4 


.000 


4 


250 


4 


.500 


4 


.750 


5 


.000 


5 


.250 


5 


,500 


5 


.750 


6 


.000 


6 


.250 


6 


.500 


6 


,750 


7 


.000 


7 


.250 


7 


.500 


7 


.750 


8. 


000 


8. 


250 


8< 


500 


8 


,750 


9 


,000 


9 


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9 


,500 


9 


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10 


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10. 


250 


10 


,500 


10 


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11 


000 


11 


250 


11. 


500 


11 


750 


12. 


000 


12 


250 


12. 


500 


12. 


750 


13. 


000 


13. 


250 


ia. 


500 


13 


750 


1+. 


000 


14. 


250 


14 


500 



Q(CFS) 

.13 

.59 

1.40 

2.76 

5.30 

8.70 

11.55 

12.91 

12.54 

11.27 

9.46 

7.33 

5.50 

4.02 

2.88 

1.92 

1.18 

.78 

.56 

.42 

.41 

.41 

.41 

.41 

.41 

.41 

.40 

.34 

.24 

.13 

.07 

.02 

.00 

.00 

0.00 

0.00 

0.00 

0.00 

0.00 

0.00 

0.00 

0.00 

0.00 

0.00 



75 



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76 



4.4 Main Option Four 

Once again, the same basic problem as presented in Section 4.1 will 
be solved here as a means of illustrating the operation of XSRAIN under 
Main Option Four. Main Option Four is really the same as Main Option 
Three, only a bit simpler—there is no accounting for soil moisture 
variation due to seasonality or antecedent rainfall. Field capacity 
soil moisture (AMC II) is assumed. The lag time estimate, t Q - 1.2 hr, 
introduced is Section 4.2 will again be used. 

With this example, Suboption 1 will be set to produce hydrographs 
with all four available methods of calculating excess rainfall 
(SUB0PT1 =4). In addition, the user-specified rainfall will be read-in 
in minutes in inches/hour. This rainfall pattern will be used "as is," 
rather than have a "balanced hyetograph" formed. 

On the following pages, the input and output data are presented. 
Input Description for XSRAIN, Main Option Four 



Card 


Field 


Columns 


Math 
Symbol 


FORTRAN 
Symbol 


Format 


Description 


1 


1 


1 




OPTION 


11 


Main Option of XSRAIN 
elected 



1 


1,2 


2 


3,4 


3 


5,6 



SUB0PT1 12 Suboption 1 (see Sec. 2.5) 

2X 
SUB0PT2 12 Suboption 2 (see Sec. 2.6) 



1 1-10 K KT F10.3 Hydraulic conductivity at 

natural saturation 
in./hr) 

2 11-20 ( S f) f SFFC F10.3 Storage suction factor at 

field capacity (in.) 

3 21-30 P P F10.3 Cumulative depth of 

precipitation (in.) 

4 30-41 t TD F10.3 Duration of storm (hr) 

5 41-50 CN CN F10.3 SCS curve number 



77 



Input Description for XSRAIN, Main Option Four (continued) 



Math FORTRAN 
Card Field Columns Symbol Symbol Format 



Description 



LAGFLAG 



II 



If LAGFLAG = 0, t- (hr) 
is computed by Eq. (3.3.1) 
If LAGFLAG = 1, t £ is 
specified by user. 



If LAGFLAG 
1 

5 2 
3 



0, Card 5 has the following format: 
1-10 AREA 



11-20 
21-30 



a 

Y 



L 
Y 



F10.2 Watershed area (square) 
miles 

F10.2 Length to divide (ft) 

F10.2 Average watershed slope 
(percent) 



If LAGFLAG 

1 



1, Card 5 has the following format: 
1-10 AREA F10.2 Watershed area (sq. mi.) 



11-20 



TL 



F10.2 Lag time (hr) 



2 
3 

4 

5 

6 

7 



1-3 

4,5 
6 

7,8 
9 

10,11 
12 



N 



N 



PFLAG 



CFLAG 



TFLAG 



13 Number of time steps 
specified by user 

2X Two blank columns 

II Flag indicating units of 
user input rain (see 
Sec. 4.3) 

2X Two blank columns 

II Flag indicating if a 

"balanced hyetograph" is 
formed (see Sec. 4.3) 

2X Two blank columns 

II Flag indicating units of 
user input time steps 
(see Sec. 4.3) 



78 



Input Description for XSRAIN, Main Option Four (continued) 

Math FORTRAN 
Card Field Columns Symbol Symbol Format Description 

1 1-10 t T(l) F6.3 Time (min or hr) at end of 

1st time step 



• • • • 



7-16* 



10 91-100 t T(10) F6.3 Time (min or hr) at end of 

10th time step 

1 1-10 r 1 R(l) F6.3 Rainfall (in. or in./hr) 



in 1st time step 



17-26* • 



• • 



10 91-100 r 1Q R(10) F6.3 Rainfall rate (in. or 

in./hr) in 10th time step 

"Number of cards depends on number of time steps of rainfall specified by 
user. Program is set up to take as many as 50 time steps. 



79 



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81 



Exhibit 4. (continued). 



OUTPUT OF SUBROUTINE UH 

WATERSHED LAG TIME » 1.200HR 
TIME TO PEAKs 1.325HR 



U^IT HYDROGRAPH 
TIME(HR) OROINATES IN <CFs/IN) 



.250 
.500 
.750 
I. 000 
1.250 
1.500 
1.750 
2.000 
2.250 
2.500 
2.750 
3.000 
3.250 
3.500 
3.750 
4.000 
4.250 
4.500 
4.750 
5.000 
5.250 
5.500 
5.750 
6.000 
6.250 
6.500 
6.750 



1.55 

5.55 

3.62 

7.67 

10.64 

12.32 

9.13 

7.69 

6.22 

4.86 

3.23 

2.16 

1.62 

1.33 

.30 

.30 

.30 

.30 

.30 

.30 

.30 

.30 

.30 

.30 

.30 

.30 

.15 



DIMENSIONLESS- OROINATES 

.020 
.020 
.047 
.099 
.137 
.159 
.118 
.099 
.080 
.063 
.042 
.028 
.021 
.017 
.004 
.004 
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.004 
.004 
.004 
.004 
.004 
.004 
.004 
.004 
.004 
.002 



82 



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84 



Exhibit 4. (continued). 



oata used to compute flood hydrographs 

T(HR.) a TIME IN HOURS 

OELP(IN) e INCREMENTAL DEPTH OF EXCESS RAINFALL 

DELTA(CFS/IN) = UNIT HYDROGRAPH ORDINATE 

DELTACCFS/lN) 

1.55* 

1.554 

3.623 

7.667 

10.643 

12.3?* 

9.128 

7.6fl9 

6.220 

A. 856 

3.231 

2.18* 

1.623 

1.3-»3 

.30* 

.30* 

.3()4 

.30* 

.30* 

.30* 

.30* 

.30* 

.30* 

.30* 

.30* 

.30* 

.152 

O.OoO 

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O.OoO 

O.OoO 

O.OoO 

O.OoO 

O.OoO 

O.OoO 

O.OoO 

O.OoO 

0.00O 
0.O0O 

O.OoO 
O.OoO 
O.OoO 
O.OoO 
O.OoO 
O.OoO 



(HR) 


DELP(IN) 


3.500 


.101 


3.750 


.164 


4.000 


.424 


4.250 


.331 


4.500 


.286 


4.750 


.190 


5.000 


.023 


5.250 


.025 


5.500 


.017 


5.750 


.019 


6.000 


0.000 


6.250 


0.000 


6.500 


0.000 


6.750 


0.000 


7.000 


0.000 


7.250 


0.000 


7.500 


0.000 


7.750 


0.000 


8.000 


0.000 


8.250 


0.000 


8.500 


0.000 


8.750 


0.000 


9.000 


0.000 


9.250 


0.000 


9.500 


0.000 


9.750 


0.000 


10.00U 


0.000 


10.250 


0.000 


10.500 


0.000 


10.750 


0.000 


11.000 


0.000 


11.250 


0.000 


11.500 


0.000 


11.750 


0.000 


12.000 


0.000 


12.250 


0.000 


12.500 


0.000 


12.750 


0.000 


13.000 


0.000 


13.250 


0.000 


13.500 


0.000 


13.750 


0.000 


14.000 


0.000 


14.250 


0.000 


14.500 


0.000 



85 



Exhibit 4. (continued). 

flood hydrograph 

TImE(HR) Q(CFS) 

3.500 „ 16 

3.750 .41 

4.000 i,28 

4.250 2,54 

4.500 4.83 

4.750 8.19 

5.000 n.36 

5.250 13.98 

5.500 14.48 

5.750 13.66 

6.000 n.78 

6.250 9,54 

6.500 7.58 

6.750 5,78 

7.000 4.23 

7.250 2.99 

7.500 1.98 

7.750 1.33 

8.000 ,89 

fi. 250 .63 

8.500 .57 

6.750 .52 

9.000 .so 



9.250 



.48 



4.500 .48 

9.750 , 48 

10.000 .47 

10.250 .43 

10.500 .34 

10.750 .22 

11.000 .13 

11.250 .05 

11.500 .02 

11.750 .01 

12.000 ,01 

12.250 .00 

12.500 o.OO 

12.750 o.OO 

13.000 o.OO 

13.250 o.OO 

13.500 o.OO 

13.750 o.OO 

14.000 o.OO 

14.250 o.OO 

14.500 o.OO 



86 



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• 

s 
I 

a a a a 



a a a a a a 11 



T3 

a 

•H 
+J 
G 
O 

u 



4J 

•H 

•H 

w 



<3 



87 



Exhibit 4. (continued). 



OUTPUT OF SUBROUTINE CONSTR, CONSTANT RAINFALL BY INFILTRATION APPROACH 
T(Hrt) W(IN) DELrf(lN) IR(In/hR) RON/HR) RE(IN/HR) RER(IVHR) 



.704 


• 2b4 


.264 










.750 


.281 


.017 


.369 


.375 


.006 


0.000 


1.000 


.365 


.084 


.337 


.375 


.038 


0.000 


1.250 


.440 


.074 


.298 


.375 


.077 


0.000 


1.300 


.508 


.068 


.272 


.375 


.103 


0.000 


1.750 


.5M 


.063 


.253 


.375 


.122 


0.000 


2.000 


.630 


.059 


.238 


.375 


.137 


.079 


2.250 


.687 


.056 


.226 


.375 


.149 


.149 


2.500 


.741 


.054 


.216 


.375 


.159 


.159 


2.750 


.793 


.052 


.208 


.375 


.167 


.167 


3.000 


.843 


.050 


.201 


.375 


.174 


.174 


3.250 


.891 


.049 


.194 


.375 


.181 


.181 


3.500 


.939 


.047 


.189 


,375 


.186 


.186 


3.750 


.985 


.046 


.184 


.375 


.191 


.191 


4.000 


1.030 


.045 


.180 


.375 


.195 


.195 


4.250 


1.074 


.044 


.176 


.375 


.199 


• 199 


4.500 


1.117 


.043 


.172 


.375 


.203 


.203 


4.750 


1.159 


.042 


.169 


.375 


.206 


.206 


5.000 


1.200 


.041 


.166 


.375 


.209 


.209 


5.250 


1.241 


.041 


.163 


.375 


.212 


.212 


5.500 


1.281 


.040 


.160 


.375 


.215 


.215 


5.750 


1.320 


.039 


.158 


.375 


.217 


.217 


6.000 


1.359 


.039 


.156 


.375 


.219 


.219 


6.250 


1.398 


.038 


.153 


.375 


.222 


.222 


6.500 


1.436 


.038 


.15! 


.375 


.224 


.224 


6.750 


1.473 


.037 


.150 


.375 


.225 


.225 


7.000 


1.510 


.037 


,148 


.375 


.227 


.227 


7.250 


1.546 


.037 


146 


.375 


.229 


.229 


7.500 


1.583 


.036 


.145 


.375 


.230 


.230 


7.750 


1.618 


.036 


.143 


.375 


.232 


.232 


8.000 


1.654 


.035 


.u? 


.375 


.233 


.233 



MASS BALANCE CHECK 

EXCESS PREC;P= 1.246 IN 
CUMULATIVE INFILTRATIONS 1.654 In 
RETENTIONS .100 IN 
TOTAL PRECIP= 3.000 IN 



88 



Exhibit 4. (continued) 



DATA USED TO COMPUTE FLOOD HYDROGRAPh: 

T(Hw) = TIME IN HOURS 

DELP(IN) = INCREMENTAL DEPTH OF EXCESS RAINFALL 

DELTA(CFS/IN> ■ UNIT HYDROGRAPH ORDINATE 

DELTA(CFS/IN) 

1.55* 

1.55* 

3.6?3 

7.667 

10.643 

12.324 

9.128 

7.6 8 9 

6.220 

4.856 

3. 231 

2.1S* 

1.623 

1.333 

.30* 

.30* / 

.30* 

.30* 

.30* 

.3o* 

.30* 

.30* 

.30* 

.30* 

.30* 

.30* 

.152 

O.OoO 

O.OflO 

O.OoO 

O.OoO 

O.OoO 

O.OoO 

O.OoO 

O.OoO 

O.OoO 

O.OoO 

O.OoO 

0.00O 

O.OoO 
O.OoO 
O.OoO 
O.OoO 
O.OoO 
O.OoO 
O.OoO 

0.00O 

O.OoO 

0.00O 

O.OoO 
O.OoO 



(HR) 


DELP(IN> 


2.000 


.020 


2.250 


.037 


2.500 


.040 


2.750 


.042 


3.000 


.044 


3.250 


.045 


3.500 


.047 


3.750 


.048 


4.000 


.049 


4.250 


.050 


4.500 


.051 


4.750 


.052 


5.000 


.052 


5.250 


.053 


5.500 


.054 


5.750 


.054 


6.000 


.055 


6.250 


.055 


6.500 


.056 


6.750 


,0ts6 


7.000 


.057 


7.250 


.057 


7.500 


.058 


7.750 


.0b8 


8.000 


.058 


8.250 


0.000 


8.50U 


0.000 


8.750 


0.000 


9.000 


0.000 


9.2S0 


0.000 


9.500 


0.000 


9.750 


0.000 


10.00U 


0.000 


10.250 


0.000 


10.500 


0.000 


10.750 


0.000 


11.000 


0.000 


11.250 


0.000 


11.500 


0.000 


11.750 


0.000 


12.000 


0.000 


12.250 


0.000 


12.500 


0.000 


12.750 


0.000 


13.000 


0.000 


13.250 


0.000 


13.500 


0.000 


13.750 


0.000 


14.000 


0.000 


14.250 


0.000 


14.500 


0.000 



89 



Exhibit 4. (continued). 



FLOOD HYOROGRAPH 


TIME(HR) 


2. 


000 


a. 


250 


2. 


500 


2. 


750 


3. 


000 


3. 


250 


3. 


500 


3< 


750 


4. 


000 


4« 


250 


4. 


500 


4. 


750 


5. 


000 


5. 


250 


5. 


500 


5. 


750 


6 


.000 


6 


.250 


6 


.500 


6 


.750 


7 


.000 


7 


.250 


7 


.500 


7 


,750 


9 


.000 


H< 


250 


8 


,500 


8 


,750 


9 


,000 


9 


.250 


9 


.500 


9 


,750 


10 


,000 


10 


.250 


10 


.500 


10 


,750 


11 


,000 


11 


,250 


11 


,500 


11 


,750 


12 


,000 


12 


,250 


12 


,500 


12 


,750 


13 


,000 


13 


.250 


13 


.500 


13 


.750 


14 


.000 


14 


.250 


14 


.500 



Q(CFS> 

.03 

.09 

.19 

.41 

.77 

1.23 

1.68 

2.07 

2.42 

2.72 

2.96 

3.16 

3.32 

3.47 

3.58 

3.67 

3.75 

3.83 

3.90 

3.96 

4.03 

4.09 

4.15 

4,20 

4.25 

4.21 

4.17 

3.99 

3.58 

2.98 

2.28 

1.76 

1.32 

.97 

.69 

.50 

.38 

.29 

.21 

.20 

.18 

.16 

.15 

.13 

.11 

.10 

.08 

.06 

.04 

.03 

.01 



90 



I 

I 
I 



* * * * 
I 

I 
I 



***** 

I 
I 
I 

• 



-. — -M || 



|| _ _. _ 

II 

II 

n 
ii 



-, _. — ii 



-. -. -. ii 



ii 
u 
M 
II 
II 
H 
It 

CI _, _ H 



-» — : — > II 



— — > — II 
II 
II 



XMHll 



I 
I 

* * 



* * * * 



I I 

I I 

I I 

I I 

******* 



0) 

5 

•H 

d 
o 

o 



W 



91 



Exhibit 4. (continued). 

OUTPUT OF SUBROUTINE SCS 
CN = 82.6 S = 2.107 IA = .421 
VARIABLE RAINFALL CASE, SCS METHOD 
T(HR) W(IN) DELW(IN) IR(IN/HR) R(IN/HR) RE(IN/HR) 



.250 


.010 


.010 


.040 


.040 


0.000 


.500 


.020 


.010 


.040 


.040 


0.000 


.750 


.030 


.010 


.040 


.040 


0.000 


1.000 


.040 


.010 


.040 


.040 


0.000 


1.250 


.050 


.010 


.040 


.040 


0.000 


1.500 


.070 


.020 


.080 


.080 


0.000 


1.750 


.100 


.030 


.120 


.120 


0.000 


2.000 


.130 


.030 


.120 


.120 


0.000 


2.250 


.160 


.030 


.120 


.120 


0.000 


2.500 


.200 


.040 


.160 


.160 


0.000 


2.750 


.250 


.050 


.200 


.200 


0.000 


3.000 


.300 


.050 


.200 


.200 


0.000 


3.250 


.497 


.197 


.789 


.800 


.011 


3.500 


.706 


.208 


.834 


1.000 


.166 


3.750 


.875 


.170 


.679 


1.000 


.321 


4.000 


1.135 


.259 


1.038 


2.000 


.962 


4.250 


1.290 


.155 


.622 


1.600 


.978 


4.500 


1.400 


.110 


.440 


1.400 


.960 


4.750 


1.468 


.067 


.269 


1.000 


.731 


5.000 


1.487 


.020 


.080 


.320 


.240 


5.250 


1.507 


.019 


.077 


.320 


.243 


5.500 


1.523 


.016 


.065 


.280 


.215 


5.750 


1.538 


.016 


.063 


.280 


.217 


6.000 


1.545 


.007 


.026 


.120 


.094 


6.250 


1.552 


.006 


.026 


.120 


.094 


6.500 


1.558 


.006 


.026 


.120 


.094 


6.750 


1.562 


.004 


.017 


.080 


.063 


7.000 


1.566 


.004 


.017 


.080 


.063 


7.250 


1.571 


.004 


.017 


.080 


.063 


7.500 


1.575 


.004 


.016 


.080 


.064 


7.750 


1.579 


.004 


.016 


.080 


.064 


8.000 


1.581 


.002 


.008 


.040 


.032 



92 



Exhibit 4. (continued) 



DATA USED TO COMPUTE FLOOD HYDROGRAPhJ 

T(HO) a TIME IN HOURS 

DFLP(IN) s INCREMENTAL DEPTH OF EXCfSS RAINFALL' 

OELTAlCFS/IN) a UNIT HroaOGRAPH ORDINATE 

0ELTA(CFS/IN) 

1.5-5* 

1.5s* 

3.6?3 

7.667 

10.643 

12.3?* 

9.1?8 

7.6fl9 

6.2?0 

4.856 

3.231 

2.18* 

1.6?3 

1.333 

.30* 

.30* 

.304 

.30* 

.30* 

.30* 

.30* 

.30* 

.3o* 

.30* 

.3o* 

.30* 

.152 

O.OoO 

O.OoO 

O.OoO 

O.OoO 

o.ooO 

O.OoO 
O.OoO 
O.OoO 
O.OoO 
O.OoO 
O.OoO 
O.OoO 

o.ooo 

O.OoO 
O.OoO 
O.OoO 
O.OoO 
O.OoO 
O.OoO 



(HR) 


DELP(IN) 


3.250 


.003 


3.500 


.0*2 


3.750 


.080 


4.000 


.2*1 


*.250 


.2*5 


4.500 


.2*0 


*.750 


.183 


5.000 


.060 


5.250 


.061 


5.500 


.054 


5.750 


.054 


6.000 


.023 


6.250 


.02* 


6.500 


.024 


6.750 


.016 


7.000 


.016 


7.250 


.016 


7.500 


.016 


7.750 


.016 


8.000 


.008 


8.250 


0.000 


8.500 


0.000 


8.750 


0.000 


5.000 


o.ooo 


9.250 


0.000 


9.500 


0.000 


9. 750 


0.000 


1 0.000 


0.000 


1 0.2S0 


0.000 


10.500 


0.000 


10.7S0 


o.ouo 


11.000 


0.000 


11.250 


0.000 


11.500 


0.000 


11.750 


0.000 


12.000 


0.000 


12.250 


0.000 


12.500 


0.000 


12.750 


0.000 


13.000 


0.000 


13.250 


0.000 


13.500 


0.000 


1.3.750 


0.000 


14.000 


0.000 


1*.250 


0.000 


14.500 


0.000 



93 



Exhibit 4. (continued) 

FLOOO HYOROGRAPH 

TIME(HR) Q(CFS) 



3.250 
3.500 



4.000 



5.000 



6.500 



7.500 
7.750 



ft. 250 
ft. 500 
8.750 
9.000 



9.750 



10.250 
10.500 
10.750 
11.000 
11.250 
11.500 
11.750 
12.000 
12.250 
12.500 
12.750 
13.000 



13.500 
13.750 
14.000 
14.250 
14.500 



94 



.00 
.07 



3.750 #20 



.67 



4.500 2#72 

4.750 4 . 78 



7.07 



5.250 9 33 

5.500 10 * 45 

5 «J 50 10.54 

6.000 9m77 

**? 50 8.63 



7.55 



6.750 6#39 

7.000 5#27 

7.250 4>28 



3.45 
2.81 



«.000 2.29 



1.93 
1.74 
1.54 
1.33 



9.500 



.92 
.78 



10.000 #66 



.56 
.45 
.34 
.24 
.15 
.11 
.09 
.07 
.06 
.04 
.04 

13.250 lH 



.02 
.01 
.01 
.00 
.00 



n * * * : 

II 
II 

N 
N 
II 

■ 
H 
N 
H 

n _■ -. -i 

N 

N 

N 

H 

II 

II 

M 

N 

■ 

M _ « ^ 

II 

N 

N 

1 

It 

N 

N 

M 

N 

|| l-l *H «-• 

II 
• 

M 
II 
H 
It 



II 
It 

n 

M 
M 

u 

n 
a 



r+ —) r+ N 



-1 « -. (I 



u <o 

II .-• 

It 

H 

u 

H 

• 



•-> .-o ~> <9 



■ 
-< -« — « 



M *« ^4 ** 





II 


«H 




• 


II 




M. 


. • 


II 




QC 


• 


n 




X 


* 


it 


O 


*-" 




it 


o 


Ul 




ii 


o 


a: 


«-4 *** 


-> ii 


o 


C— S 




ii 


• 


t- 




N 


CO 






II 








W 








H 








n 








It 








ii 


o 






u 


o 






-> ii 


o 






M 


o 






H 


• 






II 


<0 






M 








H 








H 








H 


o 






II 


o 




• . 


It 


o 




— • 


-• u 


o 






• 


• 






• 


■» 






n 








• 








u 








N 








■ 








II 


o 





I 
I 
I 
I 

* * 



I I 

I I 

I I 

I I 

********** 



******* 



***** M 



T3 

3 
•H 
■P 

d 
o 
o 



■p 

•H 

•H 

.4 
X 

w 



x 






95 



Exhibit 4. (continued). 

CONSTANT RAINFALL CASE, SCS METHOD 

T(HR) W(IN) DELW(IN) IR(IN/HR) R(IN/HR) RE(IN/HR) 



.250 


.094 


.094 


.375 


.375 


0.000 


.500 


.188 


.094 


.365 


.375 


0.000 


.750 


.281 


.094 


.375 


.375 


0.000 


1.000 


.375 


.094 


.375 


.375 


0.000 


1.250 


.468 


.093 


.371 


.375 


.004 


1.500 


.554 


.086 


.344 


.375 


.031 


1.750 


.663 


.079 


.316 


.375 


.059 


2.000 


.706 


.073 


.292 


.375 


.083 


2.250 


.773 


.068 


.270 


.375 


.105 


2.500 


.836 


.063 


.251 


.375 


.124 


2.750 


.894 


.058 


.234 


.375 


.141 


3.000 


.949 


.054 


.218 


.375 


.157 


3.250 


1.000 


.051 


.204 


.375 


.171 


3.500 


1.048 


.048 


.191 


.375 


.184 


3.750 


1.092 


.045 


.180 


.375 


.195 


4.000 


1.135 


.042 


.169 


.375 


.206 


4.250 


1.175 


.040 


.159 


.375 


.216 


4.500 


1.212 


.038 


.150 


.375 


.225 


4.750 


1.248 


.036 


.142 


.375 


.233 


5.000 


1.281 


.034 


.135 


.375 


.240 


5.250 


1.313 


.032 


.128 


.375 


.247 


5.500 


1.344 


.030 


.122 


.375 


.253 


5.750 


1.373 


.029 


.116 


.375 


.259 


6.000 


1.400 


.028 


.110 


.375 


.265 


6.250 


1.426 


.026 


.105 


.375 


.270 


6.500 


1.451 


.025 


.100 


.375 


.275 


6.750 


1.475 


.024 


.096 


.375 


.279 


7.000 


1.498 


.023 


.092 


.375 


.283 


7.250 


1.520 


.022 


.088 


.375 


.287 


7.500 


1.541 


.021 


.084 


.375 


.291 


7.750 


1.561 


.020 


.081 


.375 


.294 


8.000 


1.581 


.019 


.077 


.375 


.298 



96 



Exhibit 4. (continued) 



DATA USED TO COMPUTE FLOOD HYDROGRAPhI 

T(HR) ■ TIME IN HOURS 

OELPtIN) « INCREMENTAL DEPTH OF EXCESS RAINFALL' 

DELTA(CFS/IN) ■ UNIT HYDROGRAPH ORDINATE 1 

DELTA(CFSzlN) 

1.554 

1.554 

3.6?3 

7.667 

10.643 

12.3?4 

9.1?8 

7.6fl9 

6.2?0 

4.856 

3. 231 

2.184 

1.6?3 

1.3"*3 

.304 

.304 

.304 

.304 

.304 

.304 

.304 

.304 

.304 

*3oA 

.304 

.304 

.152 

O.OoO 

0.060 

O.OnO 

O.OoO 

O.OoO 

O.OoO 

O.OoO 

O.OoO 

O.OnO 

O.OnO 

O.OoO 

O.OoO 
O.OoO 
O.OoO 
O.OoO 
O.OoO 

0.00O 

O.OoO 
O.OoO 
O.OoO 
O.OoO 
O.OoO 

0.000 

O.OoO 
O.OoO 
O.OoO 
O.OoO 



(HR) 


OELP(IN) 


1.250 


.001 


1.500 


.008 


1.750 


.015 


2.000 


.021 


2.250 


.026 


2.500 


.031 


2.750 


.035 


3.000 


.039 


3.250 


.043 


3.500 


.046 


3.750 


.049 


4.000 


.052 


4.250 


.054 


4.500 


.056 


4.750 


.058 


5.000 


.060 


5.250 


.062 


5.500 


.063 


5.750 


.065 


6.000 


.066 


6.250 


.068 


6.500 


.069 


6.750 


.070 


7.000 


.071 


7.250 


.072 


7.500 


.073 


7.7S0 


.074 


8.000 


.074 


8.2S0 


0.000 


8.500 


0.000 


8. 7S0 


0.000 


9.000 


0.000 


9.250 


0.000 


9.500 


0.000 


9.750 


0.000 


10.000 


0.000 


10.250 


0.000 


10.500 


0.000 


10.750 


0.000 


11.000 


0.000 


11.250 


0.000 


11.500 


0.000 


11.750 


0.000 


12.000 


0.000 


12.250 


0.000 


12.500 


0.000 


12.750 


0.000 


1 3.000 


0.000 


13.250 


0.000 


13.500 


0.000 


13.750 


0.000 


14.000 


0.000 


14.230 


0.000 


14.500 


0.000 



97 



Exhibit 4. (continued). 

Fl 000 HYDROGRAPH 

TIME(HR) Q(CFS) 

1.250 .00 

1.500 * .01 

1.750 .04 

2.000 .09 

2.250 .20 

2.500 .37 

2.750 .62 

3.000 .91 

3.250 1.23 

3.500 1.56 

3.750 1.89 

4.000 2.22 

4.250 2.52 

4.500 2.81 

4.750 3.08 

5.000 3.33 

5.250 3.55 

5.500 3.76 

5.750 3.95 

6.000 4.13 

6.250 4.30 

6.500 4.45 

6.750 4.59 

7.000 4.73 

7.250 4.85 

7.500 4.97 

7.750 5,08 

3.000 5.19 

8.250 5.17 

8.500 5.14 

S.750 4.95 

9.000 4.45 

9.250 3.71 

9.500 2.84 

9.750 2.19 

10.000 1.65 

10.250 1.20 

10.500 .85 

in. 750 .62 

11.000 .47 

11.250 .36 

11.500 .26 

11.750 .24 

12.000 .22 

12.250 .20 

12.500 .18 

12.750 .16 

n.ooo .14 

13.250 .12 

13.500 .10 

13.750 .08 

1^.000 .06 

14.250 .03 

14.500 .01 



98 



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99 



4.5 Dimensional Limitations of XSRAIN 

Program XSRAIN is set up to handle storms of up to 100 steps of 
rainfall. If it is desired to use the program with an event of more 
rainfall steps than this, one must change the dimensions of pertinent 
arrays as they are defined in DIMENSION and COMMON statements. 
Specifically, if it is desired to process an event with, say 120 steps, 
simply change all arrays presently dimensioned to have 100 elements to 
be able to hold 120 elements. This can be done with one command with an 
interactive text-editing computer system. 

In a like manner, XSRAIN is capable of producing a runoff 
hydrograph with up to 150 steps of outflow. If this in not enough, 
simply change all arrays dimensioned for 150 elements to be able to hold 
the necessary number of elements. In this way, all interacting arrays 
will be of compatible size. 

5. Example Calculated by Hand 

The application of infiltration equations for variable intensity 
rainfall is not so complicated that one must rely on a high-speed 
digital computer. The following example will show that a pocket 
calculator is sufficient equipment for solving these problems. 

Suppose the following information is given: 

CN = 82.6 P = 1.1 in. AR(1) = AR(3) = AR(4) = AR(5) = 0.0 

K = 0.059 in./hr t D = 2.0 hr AR(2) = 0.25 in. 

(S ) = 0.884 Date = Sept. 29 AREA = 0.03 square miles 

£ = 1,100 ft Y = 8 percent 

5 . 1 Calculation of Time Distribution 

The next step to take is to impose a time distribution on the 

1.1 in. of rainfall over the 2 hr duration. Lets say a knowledge of 

local conditions suggests that peak rainfall typically occurs in the 

third quartile of a storm duration. A 20 minute time step is 

chosen. This is translated into a percentage of the total 

duration by ~, rr . — 7 x 100 percent = 16.7 percent. Using Figure 3 for 
2(60 nun) r r . 

a Huff third-quartile storm, one can tabulate the following values: 



100 



Step 



Cumulative percent 
storm time 


16.7 


33 


.3 


50 


.0 


66 


.7 


83 


.3 


100 


.0 


Cumulative percent 
precipitation 


7.0 


15 


.0 


28 


.0 


73 


.0 


95 


.0 


100 


.0 


Incremental percent 
precipitation 


7.0 


8 


.0 


13 


.0 


45 


.0 


22 


.0 


5 


.0 


Incremental 
precipitation (in.) 


.08 




.09 




.14 




.50 




.24 




.05 



The values in the first row are found by simply adding 16.7 percent for 
each time step. Values in the second row are read off using the Huff 
third-quartile, 50 percent probability curve in Figure 3 to pick off 
ordinate values corresponding to the first row, abscissa values. The 
numbers in the third row are just the differences between the successive 
second row values, for example, the third time step value is 
28.0 - 15.0 = 13.0. These in turn are converted into steps of inches of 
rain in the fourth row by multiplying the total depth of rain by the 
appropriate percentages, e.g., in time step three 

x 1. 1 in. = 0. 14 in. 



100.0 



The length of a time step is computed by inn * n x 2 hr = 0.33 hr. 

The mean rainfall intensity for each time step is computed by 
dividing each increment of rainfall by the length of a time step. For 
step three this would be: 

0. 14 in. _ n /o • /u 
0.33 hr = °- 42 in - /hr 

Results for all six steps are tabulated below. 



Step 



t (hr) 


.33 


.67 


1.00 


1.33 


1.67 


2.00 


r (in./hr) 


0.24 


0.27 


0.42 


1.50 


0.72 


0.15 



101 



With a variable rainfall pattern now established, one may proceed 
to the calculation of a storage suction factor revised for seasonal and 
5 day antecedent rainfall (if this is not desired, one could skip ahead 
to calculation of ponding time using the field capacity value of storage 
suction factor) . 

5 .2 Revision of Storage Suction Factor 

Calculations in this section follow the procedure programmed in 
Subroutine DEFICIT of XSRAIN. First calculate the (approximate) Julian 
date for the day in question: 

Julian date = 30 x (9-1) + 29 = 269 

Next, the AMC II value of S: 

c _ 1000 in _ 1000 in - o ii • 
S " "OT " 10 " 82T6 " 10 " 2 - U in - 



Seasonal S is found next: 

Seasonal S= [^(269-5^180)°] t 1 x (1 .3) (2. 11) + (0.2) (2. 11) 
= 3.16 in. 



Seasonal S is next modified by the 5 day antecedent rainfall and 
drying. This is most easily accomplished in a tabular fashion: 

A Day in Sequence 12 3 4 5 



B 


1.06 x Yesterday's 
Adjusted S 




3. 


.16 


3.35 


3.29 


3.48 


3.69 


C 


Antecedent Rain (AR) 




0, 


.00 


0.25 


0.00 


0.00 


0.00 


D 


Antecedent Infiltration 


0. 


,00 


0.25 


0.00 


0.00 


0.00 


E 


Adjusted S (Row B-Row 


D) 


3, 


,16 


3.10 


3.29 


3.48 


3.69 



Seasonal S = 3.16 in. is taken as the starting point in Row B, Column 1. 
There was no rainfall on the first day to change this value. Row B, 
Column 2 is filled in with 1.06 times the Row E value of S from 
Column 1, a value of 3.35. This must be modified for rain infiltrated 
on that day, which is estimated by the SCS method with I = 0.2 S and 
AMC II: 



102 



W = AR - 



(AR-0.2 S)' 
(AR+0.8 S) 



In this case, though, AR = 0.25 < 0.2 (2.11) = 0.42 =1 so all of AR 
is assumed infiltrated and the above equation doesn't apply. The 
adjusted S for day 2 is then calculated as 3.35 - 0.25 = 3.10 in. 
Values for day 3, 4 and 5 are found in a similar manner. The adjusted 
value of 3.69 in. (Row ' E' , Column 5) will be used to calculate the 
moisture deficit for the day of the storm. 



Moisture deficit at field capacity is estimated using CN: 

(6-6 fc ) = 0.253 - 0.002 CN = 0.253 - 0.002 (82.6) = 0.088 

Effective depth of the soil profile is calculated as 

n _ S AMCH _ 2.11 _ 0/ . . 



wetting front suction is found by 

„ _ (S f } fc _ 0.884 _ lft n . . 

H f - ,.-» : - 0T088 - 10 - 04 in - 



( e-e fc ) 



The moisture deficit for the day of the storm may now be calculated: 
r7\ a \ - adjusted S 3.69 in. _ A , c 

(e -e.) = -i_ = 24j0 . nj = 0^15^ 



This in turn permits the calculation of the revised storage suction 
factor: 



S f = H f (6-6^ = (10.04)(0.15) = 1.506 in. 



This value will be used in subsequent calculations of ponding time and 
post-ponding infiltration. 



5 .3 Ponding Time Calculations 
The formula employed here is 



t = t. 1 + — 
P J-l r. 



r . 



j-l 
- I 
v=l 



_K 



r v ^v'VP 



(3.4.1) 



103 



For the first time step, j = 1, one obtains 



S = ° + 04 



1.506 



24 

059 



- 1 



= 2.04 hr 



Since 2.04 > 0.33 = t 1 , the formula is tried with the next time step, 
j = 2, namely: 



v - 33 *^ 



1.506 



.27 
.059 



(0.33)(0.24) 



- 1 



= 1.60 hr 



iince 1.60 > 0.67 = t„, one must proceed to j = 3, with the result: 



t = 0.67 + -7-77 
p .42 



1.506 



.42 
.059 



- (.24)(.33)-(.27)(.33) 



- 1 



= 0.855 hr 



Since t ? = 0.67 < 0.855 < 1.00 = t„, ponding time occurs during the 
third time period, when t = 0.855 hr. 

5 .4 Calculation of Post-Ponding Infiltration 

Up to ponding time, all rainfall infiltrates. After ponding, 
cumulative ponding is calculated by the formula 



where 



W. = W + S(W ,0.) [Vt.-t +B - VI 1 + K(t.-t ) 
J P P 1 |_ J P J J P 



S(W ,6.) 
p' 1 



2K(S^+W )' 
f P 



and 



B = 



(S f +W p )' 



2 r r, 

K S f (-£ - 1)' 

1 R 



(3.5.3) 



In our case 



W = (.24)(.33) + (.27H.33) + ( .42) ( .855- .67) = 0.246 in. 



r = 0.42 in./hr 
P 



t = .855 hr 
P 



104 



Thus, we may calculate 



/ 2(.059)(1.506 + 0.246) 2 = ()>490 in 



1.506 v -* v hr i/2 

r - 1 (1.506+0. 246) 2 _ 

B ? A9 9 0-461 hr 

(.059)(1.506) (^|g - 1) Z 

Substituting, we get 

W. = 0.246 + 0.490 [~Vt .-0.855+0.461 - V0.46l] + ( .059) (t .-.855) 

W. = 0.490 Vt.-.394 + 0.059 t. - 0.137 
J J J 

Substituting values of t gives values of cumulative infiltration 
explicitly. The difference between adjacent cumulative infiltration 
depths gives incremental depths of infiltration. These may be divided 
by the length of a time step to yield mean infiltration capacity values 
for each time step. Values are tabulated below. 



j 


t (hr) 


W. (in, 


■ ) 


AW. (in, 
J 


■ ) 


I. 

J 


(in./hr) 


3 


1.00 


.303 












4 


1.33 


.416 




.113 






0.34 


5 


1.67 


.515 




.099 






0.30 


6 


2.00 


.602 




.087 






0.26 



The mean infiltration rate between ponding and the end of time step 
three is found by 

W - W 
T _ "3 jd .303 - .246 . QO . ,, 

1 " tT^t = 1.00 - .855 = °- 39 in ' /hr 
3 P 

Mean excess rainfall rate in any period is now simply found by 
subtracting the mean infiltration rate from the rainfall rate. 



105 



r = r . - I . 

e j J J 

If I. > r., then r =0 and I. = r.. 
J J e J J 

Finally, retention (interception and depression storage) of 0.1 in. 
is subtracted from the excess rainfall pattern. This quantity is 
subtracted from the beginning of the r pattern to yield the r' 
final excess rainfall pattern. A full tabulation is given below: 

t W AW I r r r' 

e e 

j (hr) (in.) (in.) (in./hr) (in./hr) (in./hr) (in./hr) 

1 0.33 0.079 0.079 0.24 0.24 0.00 0.00 

2 0.67 0.168 0.089 0.27 0.27 0.00 0.00 
ponding 0.855 0.246 0.078 0.42 0.42 0.00 0.00 

3 1.00 0.303 0.057 0.39 0.42 0.03 0.00 

4 1.33 0.416 0.113 0.34 1.50 1.16 0.88 

5 1.67 0.515 0.099 0.30 0.72 0.42 0.42 

6 2.00 0.565 0.050 0.15 0.15 0.00 0.00 

A diagram of the results is presented in Figure 14. 

5 .5 Calculation of Runoff Hydrograph 

In this section, the excess rainfall pattern computed in 
Section 5.4 will be converted to a flood hydrograph by means of the SCS 
dimensionless unit hydrograph (mass curve). 

First, the time characteristics of the unit hydrograph are 
computed. Lag time, t-, is found by Equation (5.5.1) 

0.8, ,0.7 

it (jb+jj (5.5.1) 

SL OS k 

1900 (Y) U ' D 



106 




3 
u 
i— i 

O 

CI 
nj 

O 



X 

<U 

CI 
•H 

<D 
+J 

Cm 
£ 
o 
o 

CI 

o 

•H 
+J 
R3 
U 
■P 
i— I 
•H 
4-< 

a 



0) 

s-l 

•H 



( jq/u| ) I 'J 



107 



where £ is the length to the divide (ft), 

S is the SCS watershed storage (in.), and 
Y is the average watershed slope (percent) . 

For the selected watershed, this works out to be: 

; w Cll00) - $ (2.ll+l) - 7 , „ U2 hr 

1900 (8) 3 

Next, the time to peak is calculated: 
333 

T P = ^HF + h (5 - 5 - 2) 



Computing: 



333 
T = ^° + 0.112 = 0.28 hr 
P 2 

It should be noted here that 

0.333 hr = At > 0.25 T = 0.07 hr 

P 

NEH-4 warns that in such a case the resulting flood hydrograph will be 
jagged and discontinuous. If this turns out to be so, it may be 
necessary to make calculations using shorter time steps. 

Alternatively, one may estimate lag time by another method of 
Reference Al of the Appendix. One may find that lag time is greater 
than that found by Equation (5.5.1) and that therefore At < 0.25 T . 
The curve number method was developed from observations on a great many 
different watersheds and hence may not adequately represent the 
peculiarities of the watershed in question. 

Using 20 min (0.333 hr) time steps, values of t/T are computed, 
and corresponding values of Q /Q read from Figure 8 (the SCS mass 
curve). The results are given here: 



t (hr) 


.333 


.667 


1.000 


1.333 


1 . 667 


t/T p 


1.19 


2.38 


3.57 


4.76 


5.95 


Q a /Q 


.51 


.93 


.99 


.995 


1.00 



108 



Differences between successive mass curve (Q /Q) values give 
dimensionless unit hydrograph ordinates, or deltas (6): 

6(1) = 0.51 
6(2) = 0.42 
6(3) = 0.06 
6(4) = 0.005 
6(5) = 0.005 

A flood hydrograph may now be computed by the formula: 

n 
q(n) = I r'(j) 6(n-j+l) for n = 1, 2, ..., MM (5.5.3) 
j=l 

where q(n) is an outflow in inches/hour (to be converted later to 
cfs), r'(j) is an excess rainfall rate in inches/hour, and MM is the 
total number of time steps for which flow will occur. MM is the sum 
of the number of excess rainfall steps and the number of deltas, 
minus 1. For the considered problem: 

MM = 2 + 5-l = 6 

and by Equation (5.5.3) one calculates: 

q(1 ) = r;(1) 6(1) = (0.88X0.51) = 0.45 

q(2) = r'(l) 6(2) + r 1 (2)6(1) = (0.88)(0.42) + (0.42)(0.51) 

= 0.58 
q(3) = r;(l) 6(3) + r^(2)6(2) + r;(3)6(l) 

= (0.88)(.06) + (.42)(.42) + (.00)(.51) = 0.23 

q(4) = r'(l) 6(4) + r'(2)6(3) + r*(3)6(2) + r*(4)6(l) 
e e e e 

= (0.88)(.005)+(.42)(.06)+(0.0)(.42)+(0.0)(5.1) = 0.03 

q(5) = r^(l) 6(5)+r^(2)6(4)+r^(3)6(3)+r^(4)6(2)+r^(5)6(l) 

= (0.88)(.005) + (.42)(.005) + + + = 0.0065 

q(6). = r*(l) 6(6)+r*(2)6(5)+r , (3)6(4)+r , (4)6(3)+r' (5)6(2) 
e e e e e 

+ r* (6)6(1) = (0.88)(.005) +0+0+0+0= 0.0044. 
e 



109 



These flood hydrograph values may be converted to cfs by multiplying by 
the area (square miles) and the conversion factor 645.3 (cfs/sq.mi. ) . 



It should be noted that q(l) will occur at the same time as 
r'(l), which is the step ending at t = 1.33 hr after the onset of ra: 
A tabulation of the flood hydrograph is presented: 

t (hr) 1.33 1.67 2.00 2.33 2.67 3.00 
q (cfs) 8.7 11.2 4.4 0.6 0.1 0.1 

Figure 15 is a plot of the hydrograph. 



110 




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111 



III. REFERENCES 

Huff, F. A., 1967. Time Distribution of Rainfall in Heavy Storms. 
Water Resources Research, Volume 3, Number 4. 

Morel-Seytoux, H. J. and Sanders, T. G. , 1980. Abstractions, Excess 

Rainfall and Direct Runoff. Chapter 3 of Hydrology for Transporta- 
tion Engineers , U.S. Department of Transportation, Federal Highway 
Administration, January 1980, Washington, D.C. 

Morel-Seytoux, H. J and Verdin, J. P. , 1980. Extension of the Soil 
Conservation Service Rainfall-Runoff Methodology for Ungaged 
Watersheds. Federal Highway Administration Report No. FHWA- 
RD-80-173, 75 p. 

Sobhani, G. , 1976. Masters Thesis, Utah State University. Cited in 
Hawkins, R. H. , 1978: Runoff Curve Numbers with Varying Site 
Moisture, Journal of the Irrigation and Drainage Division, ASCE, 
December 1978. 

Soil Conservation Service, 1972. National Engineering Handbook, 
Section 4, Hydrology . NEH-Notice 4-102, August 1972, U.S. 
Government Printing Office, Washington, D.C. 20402: 

Soil Conservation Service, 1975. Urban Hydrology for Small Watersheds . 
Technical Release No. 55, USDA, January 1975. 

U.S. Army Corps of Engineers, 1975. Hydrologic Engineering Methods for 
Water Resources Development—Volume 5, Hypothetical Floods. The 
Hydrologic Engineering Center, Davis, California, March 1975. 

U.S. Department of Agriculture, 1967. Evaluation of Agricultural 
Hydrology by Monolith Lysimeters, 1956-62. Technical Bulletin 
No. B67, January 1967, Washington, D.C. 

Viessman, et al., 1977. Introduction to Hydrology . Second Edition, 
1977, IEP series in civil engineering, New York. 



112 



APPENDIX 

This section consists of four miscellaneous items pertinent 
to this Manual. 

Reference Al deals with methods of estimation of time of 
concentration and lag time. It is exerpted from NEH-4, Chapter 15. 

Reference A2 deals with moisture deficit prediction from 
SCS curve number and other relations. 

Table A3 lists soil names and their hydrologic classifications. 

Exhibit Al is the complete listing of Program XSRAIN. 



113 



Reference Al. Methods of Estimation of Time of Concentration and Lag 
Time (excerpted from NEH-4, Chapter 15) 



Time of concentration 

This is the time it takes for runoff to travel from the hydraulically most 
distant part of the storm area to the watershed outlet or other point of 
reference downstream. In hydrograph analysis, T c is the time from the 
end of excessive rainfall to the point on the falling limb of the hydro- 
graph (point of inflection) where the recession curve begins (see 
Chapter 16) . T c is generally understood aa applying to surface runoff. 

The implication in the definitions of L and T c , that the time factor is 
only a case of calculating a theoretical velocity of a segment of water 
moving through a hydraulic system, is an over-simplification. As with 
lag, T c may vary because of changes in hydraulic and storage conditions. 

Estimating T c , T t and L 

Each method presented here is in effect a short-cut from which one or more 
watershed characteristics have been omitted. It is a good practice to 
consider more than one method, choosing the one that best fits the 
characteristics of a given watershed. It is not worthwhile averaging 
estimates made using two or three methods. Instead, the method that 
appears most applicable because of field and data conditions should be 
used. 

Field observations 

At the time field surveys to obtain channel data are made, there is a 
need to observe the channel system and note items that may affect channel 
efficiency. Observations such as the type of soil materials in the 
banks and bottoms of the channel; an estimate of Manning's roughness 
coefficient; the apparent stability or lack' of stability of channel; 
indications of debris flows as evidenced by deposition of coarse sediments 
adjacent to channels, size of deposited materials, etc., may be 
significant. 

Indications of channel stability can sometimes be used to bracket the 
range of velocities that normally occur in the stream channels. 
Because high sediment concentrations frequently affect both channel 
velocities and peak rates of runoff, it is important to note when this 
potential exists. 

Intensity of Investigations 

The purpose for which a study is made is a guide to the amount of work 
that should be done in securing data to serve as a basis for estimating 
T c (Chapter 6). Where the hydrograph is to be the basis for design or 
for an important conclusion in planning, sufficient surveys should be 
made to serve as a basis for (a) dividing the main drainage course into 
reaches that are approximately uniform as to channel sizes, slopes and 
characteristics and (b) determining average cross sections, roughness 
coefficients and slopes for each reach. Where the hydrograph is to be 
the basis for preliminary conclusions, T c may be estimated by taking the 
travel distance from maps or aerial photographs and estimating average 
velocity from general knowledge of the approximate sizes and characteris- 
tics of channels in the area under consideration. 

Many natural streams have considerable sinuosity, meander, etc. as well 
as overfalls and eddies. Tendencies are therefore, to underestimate the 
length of channels and overestimate average velocities through reachee. 



114 



Stream hydraulics for estimating travel time and T ff 

This method is recommended for the usual case where no usable hydrographs 
are available. This procedure is most applicable for areas where surface 
runoff predominates. It can result in too short of T c for areas where 
interflow and ground water flow are a major part of runoff. 

Stream or valley lengths and flow velocities are used, being taken from 
field survey data. It is assumed the stream has been divided into reaches. 

1. Estimate the 2-year frequency discharge in the stream. When 
this cannot be done, use the approximate bankfull discharge of the low 
flow channel. 

2. Compute the average velocity. In watersheds with narrow flood 
plains where the depth of overbank flow may be 10 to 20 feet during a 
major flood event, it may be desirable to use correspondingly higher 
velocities for frequencies of 10 to 100 years or greater. 

3. Use the average velocity and the valley length of the reach to 
compute the travel time through the reach by equation 15.1. 

U. Add the travel times of step 3 to get the T c for the watershed. 
Use of the low flow channel bankfull discharges with valley lengths is a 
compromise that gives a T c for average floods. For special cases (channel 
design, for instance) use whatever average velocities and lengths are 
appropriate. 

In most cases the hydraulic data do not extend upstream to the watershed 
ridge. The remaining time (to add in step U) can be estimated by adding 
the time obtained by the upland method or the T c obtained by the curve 
number method . See figures 15.2 and 15.3 respectively. Use the one most 
applicable to the upper watershed characteristics. 

Lag may be estimated in terms of T c using the empirical relation: 

L = 0.6 T c Eq. 15.3 

This is for average natural watershed conditions and for an approximately 
uniform distribution of runoff on the watershed. When runoff is not 
uniformly distributed the watershed can be subdivided into areas within 
which the runoff is nearly uniform, enough so that equation 15.3 can be 
applied. 

Upland method 

Types of flow considered in the upland method are: overland; through 
grassed waterways; over paved areas; and through small upland gullies. 
Upland flow employed in this method can be a combination of these various 
surface runoff conditions. The velocity is determined using figure 15.2. 

The most remote segment of runoff that becomes part of the total time of 
concentration may occur in wide sheets overland rather than in defined 
channels. This type of flow is of practical importance only in very 
small watersheds because runoff is usually concentrated into small 
gullies or terrace channels within less than a thousand feet of its 
origin. The velocity of overland flow varies greatly with the surface 
cover and tillage as demonstrated in figure 15.2. 

Surface runoff along terrace channels is another type of upland flow. 
The velocity and distance of flow that relate to time of concentration 
is based on the terrace gradient and length. A velocity of 1.5 feet 
per second can be assumed for the average terrace channel. Runoff soon 



115 



concentrates from sheet flow into small gullies. Their path of flow 
and location may change from one flood to the next. Ordinary tillage 
operations may obliterate them after each period of runoff. Still larger 
gullies are formed which under a good conservation practice are trans- 
formed into permanent grassed waterways. 

The travel time (T t ) for each type of upland flow can be computed using 
equation 15.1. The summation of these travel times will equal the T c 
in the upland or subwatershed, to the watershed outlet, or down to the 
point where hydraulic cross sections have been made for the stream 
hydraulics method. 

In a small watershed the elapsed time for overland flow in figure 15.2 
may be a substantial percent of the total watershed time of concentration. 
Conversely, it is a much smaller portion of the total time of concentra- 
tion in larger watersheds. In watersheds larger than 2000 acres, it can 
usually be ignored by extrapolating the average measured velocity over 
the entire hydraulic distance as previously described. 

The upland method should be limited to small watersheds (2000 acres or 
less) and to the sub-watershed portions of larger watersheds above and 
beyond the point where it is impractical to survey cross sections and 
make other detailed hydraulic measurements. This upstream limit is 
usually selected where natural reach storage ceases to be an important 
element in shaping a unit hydrograph for the watershed in question. 

Curve number method 

This method was developed for areas of less than 2000 acres. 

Equation 15.4 was developed from research watershed data: 

£0,8 /cj.nO.7 

L - iSZU. Eq. 15.4 

1900 Y°* B 

Where L ■ lag in hours 

I ■ hydraulic length of watershed in feet 

S ■ 1000 - 10 where CN' ■ hydrologic soil cover 
CN' 
complex number (CN) in Chapter 9. 

Y * average watershed land slope in percent 

The curve number method was developed to span a broad set of conditions 
ranging from heavily forested watersheds with steep channels and a high 
percent of the runoff resulting from subsurface or inter-flow and 
meadows providing a high retardance to surface runoff, to smooth land 
surfaces and large paved parking areas. The CN' is a measure of the 
retardance of surface conditions on the rate at which runoff concentrates 
at some point in question. This retardance . factor (CN 1 ) is approximately 
the same as the CN in Chapter 9. A thick mulch in a forest is associated 
with a low CN in Chapter 9 and reflects a high degree of retardance as 
well as a high infiltration rate. A hay meadow has a relative low CN, 
other factorB being equal, and like a thick mulch in a forest provides a 
high degree of retardance to overland flow in small watersheds. Conversely, 
"jare surfaces with very little retardance to overland flow are represented 
by a high CN' . Runoff curve number tables in Chapter 9 can be used for 
approximating the CN 1 for the "S" in equation 15.4. A CN' of less than 
50 or greater than 95 should not be used in the solution of equation 15.4. 

The slope (Y) in percent is the average land Blope of the watershed . 
Theoretically, it would be as if slopes were obtained for each corner of 
a grid system placed over the watershed, and then averaged. 

Figure 15.3 provides a quick solution to equation 15.4. 



116 





























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117 



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118 



Variations In Lag ami Tn Due to Urbanization 

Investigations have indicated that a significant increase in peak 
discharge can result from urbanization of a watershed. Such increases 
in the peak discharge are generally attributed to the construction of 
collection systems that are more efficient in a hydraulic sense than 
those provided in nature. These systems increase conveyance velocities 
so that greater amounts of discharge tend to reach points of concentra- 
tion concurrently. Where flow once prevailed over a rough terrain and 
along field gullies and stream channels, urbanization provides 
hydraulically smooth concrete gutters, streets, storm drains and open 
channel floodways that convey runoff rapidly to down s+ -ream points. 

The amount of lmperviousness due to urbanization in a watershed varies 
from about 20 percent in the case of low density residential areas to 
about 90 percent where business and commercial land use predominates. 

Table 15.1 illustrates the degree of lmperviousness with land use for 
typical urban development. 



Table 15.1. — Percent of lmperviousness for various densities of urban 
occupancy. 

Land Use % lmperviousness^ 



Low Density Residential 20 - 30 

Medium Density Residential 25 - 35 

High Density Residential 30 - 4.0 

Business - Commercial 4.0 - 90 

Light Industrial U5 - 65 

Heavy Industrial 50 - 70 

1/ Effects of Urbanization on Storm Runoff - Cudworth and Bottorf - 
South Pacific Division - Corps of Engineers. Presented to Water 
Management Subcommittee, PSIAC, March 1969. 

A CN» of 90 or 95 can be used to estimate the impervious portion. CN' 
for lawns, parks, etc. can be selected from one of the curve number 
tables in Chapter 9. 



119 



Reference A2. Moisture Deficit--CN Regression Equation and Other 
Relations 

Using data available for 9 soil textural classes, a regression 
equation was developed to permit prediction of field capacity moisture 
deficit from CN. The CN values used were the transforms of the 
least-squares S values found for each soil type. (See the discussion 
of program SCSEXT in the portion of the report (Morel-Seytoux and 
Verdin, 1980) recounting how the SCS infiltration correspondence was 
established.) The field capacity moisture deficits, (0-6 f ), were those 
reported in USDA Technical Bulletin No. 1518. A plot of the data points 
and the line which fit them is shown in Figure Al. 

Moisture deficit estimates for AMC III were found by using the CN 
in column 3 of Table A2, and working backward to find (0-8 TTT ). 
Effective capillary drive was defined by H f = (S f ) f /(0-0 f ). The 
sorptivity of Table Al corresponding to CN (AMC III) and the hydraulic 
conductivity corresponding to CN (AMC II) was used to solve for a 
storage suction factor corresponding to AMC III. This was then divided 
by the effective capillary drive, H f , to yield an AMC III moisture 
deficit, (0-0 j. The average ratio of (0-0 ) to (0-0 f ) was 
found to be 0.2. 

The mean ratio of (0-0 .,)/(0-0 f ), using data of USDA TB 1518, 
was found to be 2. 



120 




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122 



Table A2. Table of curve numbers for AMC I and AMC III 



1 


2 


3 


4 


5 


1 


2 


3 


4 


5 


CN for 








Curve* 


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100 


0.0 


0.0 


60 


40 


78 


6.67 


1.33 


99 


97 


100 


0.101 


0.02 


59 


39 


77 


6.95 


1.39 


98 


94 


99 


0.204 


0.04 


58 


38 


76 


7.24 


1.45 


97 


91 


99 


0.309 


0.06 


57 


37 


75 


7.54 


1.51 


96 


89 


99 


0.417 


0.08 


56 


36 


75 


7.86 


1.57 


95 


87 


98 


0.526 


0.11 


55 


35 


74 


8.18 


1.64 


94 


85 


98 


0.638 


0.13 


54 


34 


73 


8.52 


1.70 


93 


83 


98 


0.753 


0.15 


53 


33 


72 


8.87 


1.77 


92 


81 


97 


0.870 


0.17 


52 


32 


71 


9.23 


1.85 


91 


80 


97 


0.989 


0.20 


51 


31 


70 


9.61 


1.92 


90 


78 


96 


1.11 


0.22 


50 


31 


70 


10.0 


2.00 


89 


76 


96 


1.24 


0.25 


49 


30 


69 


10.4 


2.08 


88 


75 


95 


1.36 


0.27 


48 


29 


68 


10.8 


2.16 


87 


73 


95 


1.49 


0.30 


47 


28 


67 


11.3 


2.26 


86 


72 


94 


1.63 


0.33 


46 


27 


66 


11.7 


2.34 


85 


70 


94 


1.76 


0.35 


45 


26 


65 


12.2 


2.44 


84 


68 


93 


1.90 


0.38 


44 


25 


64 


12.7 


2.54 


83 


67 


93 


2.05 


0.41 


43 


25 


63 


13.2 


2.64 


82 


66 


92 


2.20 


0.44 


42 


24 


62 


13.8 


2.76 


81 


64 


92 


2.34 


0.47 


41 


23 


61 


14.4 


2.88 


80 


63 


91 


2.50 


0.50 


40 


22 


60 


15.0 


3.00 


79 


62 


91 


2.66 


0.53 


39 


21 


59 


15.6 


3.12 


78 


60 


90 


2.82 


0.56 


38 


21 


58 


16.3 


3.26 


77 


59 


89 


2.99 


0.60 


37 


20 


57 


17.0 


3.40 


76 


58 


89 


3.16 


0.63 


36 


19 


56 


17.8 


3.56 


75 


57 


88 


3.33 


0.67 


35 


18 


55 


18.6 


3.72 


74 


55 


88 


3.51 


0.70 


34 


18 


54 


19.4 


3-88 


73 


54 


87 


3.70 


0.74 


33 


17 


53 


20.3 


4.06 


72 


53 


86 


3.89 


0.78 


32 


16 


52 


21.2 


4.24 


71 


52 


86 


4.08 


0.82 


31 


16 


51 


22.2 


4.44 


70 


51 


85 


4.28 


0.86 


30 


15 


50 


23.3 


4.66 


69 


50 


84 


4.49 


0.90 












68 


48 


84 


4.70 


0.94 


25 


12 


43 


30.0 


6.00 


67 


47 


83 


4.92 


0.98 


20 


9 


37 


40.0 


8.00 


66 


46 


82 


5.15 


1.03 


15 


6 


30 


56.7 


11.34 


65 


45 


82 


5.38 


1.08 


10 


4 


22 


90.0 


18.00 


64 


44 


81 


5.62 


1.12 


5 


2 


13 


190.0 


38.00 


63 


43 


80 


5.87 


1.17 











infinity 


infinity 


62 


42 


79 


6.13 


1.23 












61 


41 


78 


6.39 


1.28 













*For CN in column 1 



123 



Table A3.' Soil names and hydrologic classifications. 



AA3ERG 


C 


AHL 


C 


ALMY 


B 


ANLAUF 


C 


AROOSTOOK 




AASTAD 


B 


AHLSTRON 


C 


ALOHA 


C 


ANNABELLA 


B 


AROSA 




ABAC 





AHMEEK 


B 


ALONSO 


B 


ANNANOALE 


C 


ARP 




ABAJO 


C 


AHOLT 


D 


ALOVAR 


C 


ANNISTON 


B 


AR RING TON 




ABBOTT 


D 


AHTANUM 


C 


ALPENA 


B 


ANOKA 


A 


ARRITOLA 




AB80TTST0MN 


C 


AHMAHNEE 


c 


ALPHA 


C 


AN ONES 


C 


ARROLIHE 




ABCAL 


D 


AIBONITO 


c 


ALPON 


B 


ANSARI 


D 


ARRON 




ABEG6 


8 


AIKEN 


B/C 


ALPOWA 


B 


ANSEL 


B 


ARROW 




ABELA 


B 


AIKMAN 


D 


ALPS 


C 


ANSEL MO 


A 


ARROMSHITH 




ABELL 


B 


AILEY 


B 


ALSEA 


B 


ANSON 


B 


ARROYO SECO 




ABERDEEN 





AINAKEA 


B 


ALSPAUGH 


C 


ANTELOPE SPRINGS 


C 


ART A 




ABES 


D 


AIRHONT 


C 


ALSTAD 


B 


ANTERO 


c 


ARTOIS 




ABILENE 


C 


AIROTSA 


B 


ALSTOHN 


B 


ANT FLAT 


c 


ARVADA 




ABINGTON 


B 


AIRPORT 





ALTAMONT 





ANTHO 


8 


ARYAN* 




ABIOUA 


C 


AITS 


B 


ALTAVISTA 


C 


ANTHONY 


B 


ARVESON 




ABO 


B/C 


AJO 


C 


ALTDORF 


D 


ANT I GO 


B 


ARVILLA 




ABOR 


D 


AKAKA 


A 


ALT MAR 


B 


ANTILON 


8 


ARZELL 




ABRA 


C 


AKASKA 


B 


ALTO 


C 


ANTIOCH 


D 


ASA 




ABRAHAM 


B 


AKELA 


C 


ALTOGA 


C 


ANTLER 


C 


AS8URV 




ABSAROKEfc 


C 


ALADOIN 


B 


ALTON 


B 


ANTOINE 


C 


ASCALON 




ABSCOTA 


B 


ALAE 


A 


ALTUS 


B 


ANTROBUS 


8 


ASCHOFF 




ABSHER 





ALAELOA 


B 


ALTVAN 


B 


ANTY 


B 


ASHBV 




ABSTED 





ALAGA 


A 


ALUM 


B 


ANVIK 


B 


ASHCROFT 




ACACIO 


c 


ALAKAI 


D 


ALUSA 





ANWAY 


B 


ASHDALE 




ACADEMY 


c 


ALA MA 


B 


AtYTN 


B 


ANZA 


B 


ASHE 




ACADIA 


D 


ALAMANCE 


B 


ALVIRA 


C 


ANZIANO 


C 


ASHKUN 




ACANA 


D 


ALAMO 


D 


ALVISO 


D 


APACHE 


D 


ASHLAR 




ACASCO 


D 


ALAMOSA 


C 


ALVOR 


C 


APAKUIE 


A 


ASHLEY 




ACEITUHAS 


B 


ALAPAHA 





AMADOR 





APISHAPA 


C 


ASH SPRINGS 




ACEL 





ALAPAI 


A 


ANAGON 


D 


APISON 


B 


ASHTON 




ACKER 


B 


ALBAN 


B 


ANALU 


D 


APOPKA 


A 


ASHUE 




ACKNEN 


B 


ALBANO 


D 


AMANA 


8 


APPIAN 


C 


ASHUELOT 




ACME 


c 


ALBANY 


C 


AMARGOSA 





APPLEGATE 


C 


ASHMOOD 




ACO 


B 


ALBATON 


D 


AMARILLO 


B 


APPLE TON 


c 


ASKEM 




ACOLITA 


B 


ALBEE 


C 


AMASA 


B 


APPLING 


B 


ASO 




ACOMA 


C 


ALBEMARLE 


B 


AMBERS ON 




APRON 


8 


ASOTIN 




ACOVE 


C 


ALBERTVILLE 


C 


AMBOV 


C 


APT 


C 


ASPEN 




ACREE 


c 


ALBIA 


C 


AMBRAH 


C 


APTAKISIC 


B 


ASPERNONT 




ACRELANE 


c 


ALBION 


B 


AMEDEE 


A 


ARABV 




ASSINNIBOINE 




ACTON 


6 


ALBRIGHTS 


C 


AMELIA 


B 


ARADA 


C 


ASSUMPTION 




ACUFF 


B 


ALCALOE 


C 


AHENIA 


B 


ARANSAS 


D 


ASTATULA 




ACMORTH 


B 


ALCESTER 


B 


AMERICUS 


A 


ARAPIEN 


C 


ASTOR 


A/0 


ACV 


c 


ALCOA 


B 


AMES 


C 


ARAVE 





ASTORIA 




AOA 


B 


ALCONA 


B 


AMESHA 


B 


ARAVETON 


B 


ATASCADERO 




AOAIR 





ALCOVA 


B 


AMHERST 


C 


ARBELA 


C 


ATASCOSA 




ADAMS 


A 


ALDA 


C 


AMITY 


C 


ARBONE 


B 


ATCO 




ADAMSON 


»/ 


ALOAX 





AMMON 


B 


ARBOR 


B 


ATENCIO 




ADAHSTOMN 


ALOEN 


D 


AMOLE 


C 


ARBUCKLE 


B 


ATEPIC 




AOAMSVILLE 


c 


ALDER 


6 


AMOR 


B 


ARCATA 


B 


ATHELMOLD 




AOATON 





ALDERDALE 


C 


AMOS 


C 


ARCH 


B 


ATHENA 




ADAVEN 





ALOERHOOD 


C 


AHSOEN 


B 


ARCHABAL 


8 


ATHENS 




ADDIELOU 


c 


ALOINO 


C 


AMSTERDAM 


B 


ARCHER 


C 


ATHERLY 




ADDISON 





ALDHELL 


C 


AMTOFT 


D 


ARCH IN 


C 


ATHERTON 


B/D 


ADOV 


c 


ALEKNAGIK 


B 


AMY 


D 


ARCO 


B 


ATHNAR 




AOE 


A 


ALEMEDA 


C 


ANACAPA 


B 


ARCOLA 


C 


ATHOL 




ADEL 


A 


ALEX 


B 


ANAHUAC 





ARO 


C 


ATKINSON 




ADELAIDE 


D 


ALEXANDRIA 


C 


ANAMITE 


D 


ARDEN 


B 


ATLAS 




ADELANTU 


B 


ALEXIS 


B 


ANAPRA 


6 


ARDENVOIR 


B 


ATLEE 




AOELINO 


B 


AtFORD 


• 


ANASA2I 


B 


AROILLA 


C 


ATN3RE 


B/D 


ADELPHIA 


C 


ALGANSEE 


B 


AHATONE 





AREDALE 


B 


ATOKA 




AOENA 


C 


ALGERITA 


B 


ANAVERDE 


B 


ARENA 


C 


ATON 




AD6ER 





ALGIERS 


C/D 


ANAWALT 


D 


ARENALES 




ATRVPA 




AOIL1S 


-A 


ALGOHA 


B/D 


ANCHO 


B 


ARENDTSVILLE 


B 


ATSION 




ADIRONDACK 




ALHAHBRA 


6 


ANCHORAGE 


A 


ARENOSA 


A 


ATTERBERRY 




ADIV 


B 


ALICE 


A 


ANCHOR BAY 


D 


ARENZVILLE 


B 


ATTEMAN 




AOJUNTAS 


C 


ALICEL 


• 


ANCHOR POINT 





ARGONAUT 


D 


ATTICA 




ADKINS 


B 


ALICIA 


B 


ANCLOTE 





ARGUELLO 


B 


ATTLEBORO 




AOLER 


c 


ALIOA 


B 


ANCO 


C 


AR6VLE 


8 


ATHATCR 




AOOLPH 


e 


ALIKCHI 


B 


ANOERLV 


C 


ARIEL 


C 


ATMELL 


C/D 


ADRIAN 


A/D 


ALINE 


A 


ANDERS 


c 


ARIZO 


A 


ATHOOD 




AENEAS 


a 


ALKO 





ANDERSON 


B 


ARKABUTLA 


C 


AUBBEENAUBBEE 




AETNA 


B 


ALLAGASH 


B 


ANDES 


c 


ARKPORT 


8 


AUBERRV 




AFTON 


B 


ALLARO 


B 


ANDORINIA 


c 


ARLAND 


8 


AU6URN 


C/D 


AGAR 


B 


ALLEGHENY 


B 


A NO OVER 





ARLE 


8 


AUBURNDALE 




AGASSIZ 


D 


ALLEMANDS 





ANDREEN 


B 


ARLING 


D 


AUOIAN 




AGATE 


D 


ALLEN 


B 


ANOREESQN 


C 


ARLINGTON 


C 


AU GRES 




AGAHAM 


B 


ALLENDALE 


C 


ANDRES 


B 


ARLOVAL 


C 


AUGSBURG 




AGENCY 


C 


ALLENS PARK 


B 


ANDREWS 


c 


ARMAGH 


D 


AUGUSTA 




AGER 





ALLENSVILLE 


C 


ANED 


D 


ARHIJO 


D 


AULD 




AGNER 


B 


ALLENTINE 





ANETH 


A 


ARMINGTON 


D 


AURA 




AGNEM 


B/C 


ALLENMOOO 


B 


ANGELICA 





ARMO 


8 


AURORA 




AGNOS 


S 


ALLESSIO 


B 


ANGELINA 


B/O 


ARMOUR 


8 


AUSTIN 




AGUA 


B 


ALLEY 


C 


ANGELO 


C 


ARMSTER 


C 


AUSTUELL 




AGUADILLA 


A 


ALLIANCE 


B 


ANGIE 


c 


ARMSTRONG 





AUXVASSE 




AGUA DOLCE 


C 


ALLIGATOR 





ANGLE 


A 


AAMUCHEE 


D 


AUZQUI 




AGUA FRIA 


B 


ALL IS 


D 


ANGLEN 


8 


ARNEGARD 


8 


AVA 




A GO ALT 


B 


ALLISON 


C 


ANGOLA 


C 


ARNHART 


C 


AVALANCHE 




AGUE DA 


• 


ALLOUEZ 


c 


ANGOSTURA 


8 


ARNHE IM 


C 


AVALON 




AGUILITA 


B 


ALLOHAY 




ANHALT 





ARNO 





AVERY 




A GUI ARE 





ALMAC 


B 


ANIAK 





ARNOLD 


B 


AVON 




A GUST IN 


B 


ALMENA 


C 


ANITA 


D 


ARNOT 


C/D 


AVONBURG 




AHATONE 





ALMONT 





ANKENY 


A 


ARNY 


A 


AVONDALE 




NJTES A 


BLANK HYDROLOGIC 


SOIL 


GROUP INDICATES 


THE SOIL GROUP HAS NOT 


BEEN 


DETERMINED 






TMO SDIL GROUPS SUCH AS 


B/C INDICATES THE DRAINEO/UNORAINED SITUATION 







NEH Notice U-102, August 1972 



124 



Table A3, (continued). 



AUBREY 


D 


BARKER 


C 


BECKET 


C 


BERRENDOS 


D 


BLACKROCK 


B 


AXTELL 





BARKERVILLE 


c 


B EC KIEV 


B 


BERRVLAND 


D 


BLACKSTON 


B 


AVAR 


D 


BARKLEY 


B 


BECKTON 





BERTELSON 


B 


BLACKTAIL 


B 


AVCOCK 


B 


BARLANE 


D 


BECKWITH 


C 


6ERTHOUD 


B 


BLACKWATER 





AVON 


B 


BARLING 


c 


BECKWOURTH 


B 


BERTIE 


C 


BLACKWELL 


B/D 


AYR 


B 


BARLOW 


B 


BECREEK 


B 


BERTOLOTTI 


B 


BLADEN 





AVRES 





BARNARD 


D 


BEDFORD 


C 


BERTRANO 


B 


BLAGO 


D 


AYRSHIRE 


C 


BARNES 


B 


BEDINGTON 


B 


BERVILLE 





BLAINE 


B 


AVSEES 


B 


BARNESTON 


B 


BEONER 


C 


BERYL 


8 


BLAIR 


C 


AZAAR 


C 


BARNEY 


A 


BEEBE 


A 


BESSEMER 


B 


BLAIRTON 


C 


AZARNAN 


C 


8ARNHARDT 


B 


BEECHER 


C 


BETHANY 


C 


BLAKE 


c 


AZELTINE 


B 


BARNSTEAO 




BEECHY 




BETHEL 





BLAKELAND 


A 


AZFIELO 


B 


BARNUM 


B 


BEEHIVE 


B 


BETTERAVIA 


C 


BLAKENEY 


C 


AIT ALAN 


B 


BARRAOA 


D 


BEEK 


C 


BETTS 


B 


BLAKEPORT 


B 


AZTEC 


B 


BARRETT 


D 


BEENOM 





BEULAH 


B 


BLALOCK 





AZULE 


C 


BARRINGTON 


B 


BEEZAR 


B 


BEVENT 


B 


BLAME* 


C 


AZWELL 


B 


BARRON 


B 


BEGAY 


8 


BEVERLY 


B 


BLANCA 


B 






BARRONETT 


c 


BEGOSHIAN 


C 


BEW 





BLANCHARD 


A 


BABB 


A 


BARROWS 


D 


BEHANIN 


8 


6EWLEYVILLE 


B 


BLANCHESTER 


B/O 


BA8BINGTON 


B 


BARRY 





BEHEMOTOSH 


B 


BEWLIN 





BLAND 


C 


8ABCOCK 


C 


BARSTOW 


B 


BEHR1NG 





BEXAR 


C 


BLANDFORD 


C 


BABYLON 


A 


BARTH 


C 


BEIRMAN 





BEZZANT 


B 


BLANOING 


B 


BACA 


C 


BARTINE 


c 


BEJUCOS 


B 


BIBB 


B/D 


BLANEV 


B 


BACH 


D 


BARTLE 





BELCHER 





6IB0N 


A 


BLANKET 


C 


BACKUS 


C 


BARTLEY 


c 


BELDEN 


D 


BICKELTON 


B 


BLANTON 


A 


BACKBONE 


A 


BARTON 


B 


BELDING 


B 


BICKLETON 


C 


BLANVON 


C 


BACULAN 


A 


BARTONFLAT 


B 


BELEN 


C 


BICKMORE 


C 


BLASOELL 


A 


BADENAUGH 


B 


BAR VON 


c 


BELFAST 


B 


BICONOOA 


c 


BLASINGANE 


C 


BADGER 


C 


6ASC0M 


B 


BELFIELD 


B 


8IO0EFORD 





BLAZON 





BADGERTON 


B 


BASEHOR 





BELFORE 


B 


BIDOLEMAN 


C 


BLENCOE 


C 


BAOO 





BASHAW 


D 


BELGRAOE 


B 


BIDNAN 


C 


BLEND 





BAOUS 


C 


BASHER 


B 


BELINDA 


D 


BIDWELL 


B 


BLENOON 


B 


BAGARO 


c 


BASILE 


D 


BELKNAP 


C 


BIEBER 


D 


BLETHEN 


B 


BAGDAD 


B 


BASIN 


C 


BELLAMY 


C 


BIENVILLE 


A 


BLEVINS 


B 


BAGGOTT 





BASINGER 


c 


BELLAVISTA 





BIG BLUE 


D 


BLEVINTON 


B/O 


BAGLEV 


B 


BASKET 


c 


BELLE 


B 


BIGEL 


A 


BLICHTON 





BAHEN 


B 


BASS 


A 


BELLEFONTAINE 




BIGELOW 


C 


BLISS 


D 


BAILE 


D 


BASSEL 


B 


BELLICUM 


B 


B I GET TV 


C 


BLOCKTON 


C 


BAINV1LLE 


C 


BASSE TT 


B 


BELLINGHAM 


C 


BIGGS 


A 


BLD3GETT 


A 


BAIRD HOLLOW 


C 


BASSFIELD 


B 


6ELLPINE 


C 


BIGGSVILLE 


B 


BLOHFORO 


8 


BAJURA 


D 


BASSLER 


D 


BELMONT 


B 


BIG HORN 


C 


BLOOM 


C 


BAKEOVEN 


D 


BASTIAN 





BELMORE 


8 


BIGNELL 


» 


BLOONFIELD 


A 


BAKER 


C 


BASTROP 


B 


BELT 


D 


BIG TIMBER 





BLOOMING 


B 


BAKER PASS 


B 


BATA 


A 


BELTED 


D 


BIGWIN 


D 


BLOOR 





BALAAM 


A 


BATAV1A 


B 


BELTON 


C 


BIJOU 


A 


BLOSSOM 


C 


BALCH 


D 


BATES 


B 


BELTRAMI 


8 


BILLETT 


A 


BLOUNT 


C 


BALCON 


B 


BATH 


C 


BELTSVILLE 


C 


BILLINGS 


C 


BLOUNTVILLE 


C 


BALD 


C 


BATTERSON 


D 


BELUGA 


D 


BINDLE 


B 


BLUCHER 


C 


BALDER 


C 


BATTLE CREEK 


C 


BELVOIR 


C 


BINFORD 


B 


BLUEBELL 


C 


BALOOCK 


B/C 


6ATZA 


D 


BENCLARE 


C 


BINGHAM 


B 


BLUE EARTH 


D 


BALDWIN 





BAUDETTE 


B 


BENEVOLA 


c 


BINNSVILLE 


D 


BLUE JOINT 


B 


BALDY 


B 


BAUER 


C 


BENEWAH 


c 


BINS 


B 


BLUE LAKE 


A 


BALE 


C 


BAUGH 


B/C 


BENFIRLD 


X 


BINTON 


C 


BLUEPOINT 


B 


BALLARD 


B 


BAXTER 


8 


BENGE 


B 


BIPPUS 


B 


BLUE STAR 


8 


SALLER 


D 


BAXTER VI LLE 


8 


6EN HUR 


6 


BIRCH 


A 


BLUEWING 


8 


BALLINGER 


C 


BAYAMON 


8 


BENIN 


D 


BIRCHWOOD 


C 


BLUFFOALE 


C 


BALN 


B/C 


BAYARO 


A 


BENITO 


D 


BIRDOW 


B 


BLUFFTON 





BALKAN 


B/C 


BAYBORO 





BENJAMIN 


D 


BIRDS 


C 


BLUFORD 





6AL0N 


B 


BAVERTON 


C 


BEN LOMOND 


B 


BIRDS ALL 


D 


BLV 


B 


BALTIC 


D 


BAYLOR 


D 


BENMAN 


A 


BIRDSBORO 


B 


BLYTHE 


D 


BALTIMORE 


B 


BAYSHORE 


B/C 


BENNDALE 


B 


BIRDSLEY 


D 


BOAROTREE 


C 


BALTU 


D 


BAYSIDE 


C 


BENNETT 


C 


BIRKBECK 


B 


BOBS 


D 


BAHBER 


B 


BAVUCOS 





BENNINGTON 





BISBEE 


A 


BOBTAIL 


B 


BAMFORTH 


B 


BAVWOOO 


A 


BENOIT 


D 


BISCAY 


C 


BOCK 


B 


8ANCAS 


B 


BAZETTE 


C 


BENSON 


C/O 


BISHOP 


B/C 


93 DELL 


D 


BANCROFT 


B 


BAZILE 


B 


•ENTEEN 


B 


8SSPING 


B 


B03ENBURG 


B 


BANDERA 


B 


BEAD 


C 


BENTONVILLE 


C 


BISSELL 


B 


BODINE 


B 


BANCO 


C 


BEADLE 


C 


BENZ 


D 


BIST I 


C 


BOEL 


A 


BANGOR 


B 


BEALES 


A 


BEOTIA 


B 


BIT 


D 


BOELUS 


A 


BANGSTON 


A 


BEAR BASIN 


B 


BEOWAWE 





BITTERON 


A 


BOESEL 


6 


BANKARD 


A 


BEAR CREEK 


C 


BERCAIL 


C 


BITTERROOT 


C 


BOETTCHER 


C 


BANKS 


A 


BEAROALL 


I 


BERDA 


B 


BITTER SPRING 


c 


BOGAN 


C 


BANNER 


C 


BEAROEN 


c 


BEREA 


C 


BITTON 


B 


BOGART 


B 


BANNERVILLt 


C/O 


BEARDSTOWN 


c 


8ERENICET0N 


B 


BIXBY 


B 


BOGUE 


D 


BANNOCK 


B 


BEAR LAKE 


D 


BERENT 


A 


BJORK 


C 


BOHANNON 


C 


BANQUETE 





BEARMOUTH 


A 


6ERGLANO 





BLACHLY 


c 


BOHEMIAN 


B 


BARABOU 


B 


BEARPAH 


6 


BERGSTROM 


6 


BLACK BURN 


B 


B3ISTFORT 


C 


Baraga 


C 


BEAR PRAIRIE 


6 


BERINO 


8 


BLACK BUTTE 


C 


BOLAR 


c 


BARBARY 





BEARSKIN 


D 


BERKELEY 




BLACK CANYON 


D 


BOLD 


B 


BARBOUR 


6 


BEASLEV 


C 


BERKS 


C 


BLACKCAP 


A 


BOLES 


c 


BARBOURVILLE 


B 


SEASON 


C 


BERKSHIRE 


B 


BLACK ETT 


8 


BOLIVAR 


B 


BARCLAY 


C 


BEATON 


c 


BERLIN 


C 


BLACK FOOT 


B/C 


BOLIVIA 


B 


BARCO 


B 


BEATTY 


c 


BERMESA 


C 


BLACK HALL 





BOLTON 


B 


BARCUS 


B 


BEAUCOUP 


B 


BERNUOIAN 


B 


BLACK HAWK 


D 


B3MBAV 


8 


BARD 


D 


BEAUFCRD 





BERNAL 





BLACK LEAF 


B 


BON 


B 


BAKCfcN 


C 


BEAUMONT 


D 


BERNALDU 


B 


BLACKLEED 


A 


BONACCORO 





BARDLEY 


C 


BEAUREGARD 


c 


BERNARD 





BLACKLOCK 


D 


BONAPARTE 


A 


BARELA 


c 


BEAUSITE 


8 


BERNARDINO 


c 


BLACKMAN 


C 


BOND 





BARFIEL0 





BEAUVAIS 


B 


BERNAROSTON 


c 


BLACK MOUNTAIN 


D 


BONORANCH 





BARFUSS 


s 


BEAVERTON 


A 


BERNHILL 


B 


BLACKOAR 


C 


60N0URANT 


B 


BARGE 


C 


BECK 


C 


BERNICE 


A 


BLACKPIPE 


C 


BONE 





BARISHMAN 


c 


BECKER 


B 


BERNING 


C 


BLACK RIDGE 


D 


BONG 


B 


NOTES A 


BLANK HYDRDLOGIC 


SOIL 


GROUP INDICATES 


THE SOIL GROUP HAS NOT BEEN 


DETERMINED 






TWO SOIL GROUPS SUCH AS 


B/C 


INDICATES THE DRAI NED/UNDRAINED SITUATI31 







NEH Notice U-102, August 1972 



125 



Table A3, (continued) 



BONHAR 


C 


BRANDON 


B 


BROOKLYN 





BUSTER 




CANPSPASS 


C 


BONIFAV 


A 


BRANDYWINE 


C 


BROOKS IDE 


C 


BUTANO 




CAMPUS 


B 


BONILLA 


B 


BAANFORD 


B 


BROOKSTON 


B/O 


BUTLER 




CANRODEN 


C 


BONITA 





BRANTFORD 


6 


BROOKSVILLE 





BUTLERTOWN 




CANA 


c 


BONN 





BRANVON 





SROONFIELD 


D 


BUTTE 




CANAAN 


C/O 


BONNER 


B 


BRA SHEAR 


C 


BROSELEV 


S B 


BUTTERFIELD 




CANAOEAN 


B 


BONNET 


B 


BRASSFIELO 


B 


BROSS 




BUTTON 




CANADICE 





BONNEVILLE 


B 


BRATTON 


B 


BROUGHTON 




BUXIN 




CANANOAIGUA 


D 


BONNICK 


A 


BRA VANE 





BROWARD 




BUXTON 




CANASERAGA 


C 


BONNIE 





BRAXTON 


C 


BROW NELL 




BYARS 




CANAVERAL 


C 


BONO 





BAAYMILL 


B/O 


6R0WNFIELD 




BVNUM 




CANBURN 


D 


BONSALL 





BRAYS 


D 


BROWNLEE 




BYRON 




CANDELERO 


C 


BONTA 


C 


BRAY TON 


C 


BROYLES 








CANE 


c 


BONTI 


C 


BRA 1 1 TO 


A 


MUCE 




CABALLO 




CANEADEA 


D 


BOOKER 





BRAZOS 


A 


6RUFFY 




CABARTON 




CANEEK 


B 


BOOMER 


B 


BREA 


B 


BRUIN 




CABBA 




CANEL 


B 


BOONE 


A 


8AECKENRIDGE 





BRUNEEL 


B/C 


CABBART 




CANELO 





BOONE SBOAO 


B 


BRECKNOCK 


B 


BRUNO 




CABEZON 




CANEV 


C 


BOONTON 


C 


BREECE 


B 


BRUNT 




CABIN 




CANEYVILLE 


c 


BOOTH 


C 


BRE6AR 


D 


BRUSH 




CABINET 




CANEZ 


8 


BORACHO 


C 


BREHE* 


B 


MUSSETT 




CABLE 




CANFIELD 


c 


BORAH 


A/C 


BREMER 


S 


BRYAN 




CABO ROJO 




CANISTEO 


c 


BMOA 


D 


••Em 


C 


MVCAN 


6 


CABOT 




CANNINGER 


D 


BORDEAUX 


B 


•RENS 


A 


BRYCE 





CACAPON 




CANNON 


B 


BORDEN 


B 


BRENOA 


C 


BUCAN 


D 


CACHE 




CANOE 


B 


BORDER 


a 


8RENNAN 


B 


BUCHANAN 


C 


CACIQUE 




CANONCITO 


B 


BORNSTEDT 


c 


BRENNER 


c/o 


BUCHENAU 


C 


CAODO 




CANOVA 


B/D 


BOftAECO 


c 


BRENT 


C 


EUCHER 


C 


CAOEVILLE 




CANTALA 


B 


BORUP 


B 


BRENTON 


B 


BUCKHOUSE 


A 


CADMUS 




CANTON 


B 


BORVANT 





BRENTWOOD 





BUCKINGHAM 




CADOMA 




CANTRIL 


B 


BORZA 


c 


BRESSER 


• 


•UCKLAND 


C 


CAOOR 




CANTUA 


B 


BOSANKO 





BREVARD 


• 


BUCKLE BAR 


B 


CAGEY 




CANUTIO 


B 


BOKO 


B 


BREVORT 





BUCKLEY 


B/C 


CACUASO 




CANYON 


D 


BOSKET 


B 


BREMER 


C 


BUCKLON 





C AOMIN 




CAPAC 


B 


BOSLEA 


B 


BREMSTER 





BUCKNER 


A 


CAHABA 




CAPAV 


D 


BOSQUE 


S 


BRENTON 


c 


BUCKNEY 


A 


CAHILL 




CAPE 





BOSS 





BRICREL 




BUCKS 


B 


CAHONE 




CAPE FEAR 





BOSTiM 


c 


BRICKTON 




BUCKSKIN 


C 


CAHTO 




CAPERS 





BOSTMICK 


B 


BRID6E 




eUCODA 


C 


CAID 




CAPILLO 




BOSHELL 


D 


BRI D«E HAMPTON 




BUOO 


B 


CAIRO 




CAPLES 




SOSttORTH 





BRIDGEPORT 




BUOE 


C 


CAJALCO 




CAPPS 




BOTELLA 


B 


BRIDCER 




BUELL 


B 


CAJON 




CAPSHAM 




BOTHHELL 


C 


BRIDGE SON 


B/C 


BUENA VISTA 


6 


CALABAR 




CAPULIN 




BOTTINEAU 


c 


BRIDGET 




BUFFINGTON 


B 


CALABASAS 




CAPUTA 




BOTTLE 


A 


BRID6EVILLE 




BUFFMEYER 


B 


CALAIS 




CARACO 




BOULDER 


• 


BRIDCPORT 




BUFF PEAK 


C 


CALAMINE 




CARALAMPI 




BOULDER LAKE 


/ 


BRIEOHELL 


• 


BUICK 


C 


CALAPOOYA 




CARBO 




BOULDER POWJT 


B 


BRIEF 


• 


•UIST 


B 


CALAWAH 




CARBOL 




BOULFLAT 


D 


BRIENSBURG 




BUKREEK 


B 


CALCO 




CARBONDALE 




BOURNE 


c 


BR I CCS 


A 


BULLION 





CALDER 




CAABUftV 




BOH 




BRICCSOALE 


c 


BULLREV 


B 


CALDWELL 




«RCITY 




BOHBAC 




BRICCSVILLE 


c 


BULL RUN 


6 


C ALE A ST 




CARDIFF 




MHBELLS 




BRIGHTON 


A/D 


BULL TRAIL 


B 


CALEB 




CAtDINGTON 




80*00 IN 




•RICHTHOOO 


c 


BULLY 


B 


CALERA 




CAROON 




BONDRE 




BRILL 


B 


BUMGARO 


B 


CALHI 




CAREY 




BOHERS 




BRIM 


C 


BUNCOMBE 


A 


CALHOUN 


> 


CAREY LAKE 




BOM IE 




•RINMELO 


c/p 


BUNDO 


6 


CALICO 


> 


CAREVTONN 




BOWMAN 


B/D 


BRIHLEY 


6 


BUNOVNAN 


C 


CALIFON 




CAR6ILL 




BOMMANSVILLt 




6RINEGAR 


B 


BUNEJUG 


C 


CALIMUS 




CAR I BE 




BOX ELDER 




MINKERT 


C 


BUNKER 


t> 


CALITA 




CARIBEL 




BOIWELL 




IRINKERTON 


D 


BUNSELNEIER 


c 


CALIZA 




CARIBOU 




BOY 




•RISCOT 


B 


BUNTINGVILLE 


B/C 


CALKINS 




CARLIH 




BOTCE 


B/D 


MITE 


C 


BUNVAN 


• 


CALL A BO 




CARLINTON 




BOYD 




MITTON 
SRI Z Aft 


C 


BUR BANK 


A 


CALLAHAN 




CARLISLE 


A/D 


•OVER 




A 


surch 


B 


CALLEGUAS 




CARLOTTA 




BOVNTON 




MOAC 


C 


BURCHAAD 


• 


CALL INGS 




CAALM 




BOY SAG 




MOAOALB IN 


C 


•URCHELL 


B/C 


CALLOWAY 




CARLSBAD 




BOVSEN 




MOADAX 


B 


BUROETT 


C 


CALNAR 




CARLSBORG 




BOZARTH 




MOAOMOOK 


C 


BUREN 


c 


CALNEVA 




CARLSON 




BOZE 




MOAO CANYON 


B 


BURGESS 


c 


CALOUSE 




CARLT9N 




BOZEMAN 




MOADHEAO 


C 


BURG I 


• 


C ALPINE 




CARMI 




MACEVILLI 




MOAOHURST 





•UA6IN 





CALVERT 




CARHASAW 




BRACKEN 




MOCK 


D 


ftWRKE 


c 


CALVERTON 




CARNEGIE 




BRACK ETT 




MOCKLISS 


C 


BURKHARDT 


• 


CALVIN 




CARNERO 




BRAD 




•ROC KHAN 


C 


BURLEIGH 


D 


CALVISTA 




CARNEY 




MADOOCK 




BROCKO 


• 


BURLESON 


D 


CAM 




CAROLINE 




BRADENTON 


•70 


MOCKPORT 





BURLINGTON 


A 


CAMAGUEY 




CAXR 




BRADER 




BROCKTON 





BURMA 




CAHARGO 




CARRISALITOS 




BRADFORD 




MOCKHAV 


B 


BURNESTER 


D 


CAMARILLO 


l/C 


CARRIZO 




MAOSHAW 




•ROOV 


C 


BURNAC 


c 


CAMAS 




CARSITAS 




•RADHAT 




•ROE 


• 


BURNETTE 


B 


CAMAS CREEK 


I/O 


CARSLEY 




BRADV 




M06AN 


• 


•URNHAN 





CAM6ERN 




CARSO 




BRADWILLE 




•ROCDON 


■ 


BURNSIOE 


B 


CAMBRIOGE 




CARSON 




BAA HAN 




BROLLIAR 





BURNSVILLE 


B 


CAMDEN 




CARSTAIRS 




BRAINERD 




MONO 


• 


BURNT LAKE 


• 


CAMERON 




CARSTUNP 




•RALLIER 




■ RONAUCH 


• 


•URRU 





CAMILLUS 




CART 




BRAN 




BRONCHO 


• 


•URT 


D 


CAMP 




CARTAGENA 




MAAARO 




BRONSON 


B 


BURTON 


B 


CAMPBELL 


i/c 


CARTECAf 




BRAMBLE 




BRONTE 


C 


BUSE 


B 


C AMPHORA 




CARUSO 




BR AIM ELL 




BROOKE 


C 


BUSH 


B 


CAMP I A 




CARUTHERSVILLE 




SAANO 


D 


BROOKFIELD 


B 


•USHNELL 


c 


CAMPO 




CA*¥ER 




MAMDENBUR6 


A 


BROOKINGS 


B 


•USHVALLEY 


D 


CAMPONE 4 


i/c 


CARWILE 


D 


NOTES 
71 


A 


•LANK HVOROLOGIC 


SOIL 


GROUP INOICATES 


THE SOIL GROUP HAS NOT B 


EEN 


DETERMINED 




tt SOIL CROUPS SUCH AS 


B/C INOICATES THE DRAINED/UNDRAINEO SITUATI31 









NEH Notice U-102, August 1972 



126 



Table A3, (continued). 



CARVVILLE 


B CENTRAL POINT 


B 


CHI LGREN 


C 


CLARESON 


C 


COKEOALE 


B/C 


CASA GRANDE 


C CERE SCO 


A 


CHILHOHIE 


c 


CLAREVILLE 


C 


COREL 


B 


CASCAOE 


C CERRILLOS 


B 


CHILI 


B 


CLARINDA 


D 


COKER 





CASCAJO 


B CERRO 


C 


CHILKAT 


C 


CLARION 


B 


COKESBURY 





CASCILLA 


B CHACRA 


C 


CHILLICOTHE 


c 


CLARITA 





COKEVILLE 


B 


CASCO 


B CHAFFEE 


C 


CHILLISDUAQUE 




CLARK 


B 


COLBATH 


C/D 


CASE 


B CHAGRIN 


B 


CHILLUM 


B 


CLARK FORK 


A 


COLBERT 


D 


CASES IEA 


CHAIX 


B 


CHI LNARK 


B 


CLARKSBURG 


C 


COLSURN 


B 


CASEV 


C CHALFONT 


C 


CHILO 


B/O 


CLARKSDALE 


c 


COLBY 


B 


;ashel 


C CHALMERS 


C 


CHILOOUIN 


B 


CLARK SON 


B 


COLCHESTER 


B 


:ashion 


D CHAHA 


B 


CHILSON 


D 


CLARK SV ILLE 


B 


COLDCREEK 


B 


CASHMERE 


B CHAMBER 


C 


CHILTON 


B 


CLARNO 


B 


COLDEN 





CASHHONT 


B CHAHBERINO 


C 


CHI MAYO 


D 


CLARY 


B 


COLO SPRINGS 


C 


CASINO 


A CHANISE 


B 


CHIMNEY 


B 


CLATO 


B 


COLE 


B/C 


CASITO 


D CHAMDKANE 


B 


CHINA CREEK 


6 


CLATSOP 


D 


COLEBROOK 


B 


CASPAR 


B CHAMPJON 


B 


CHINCHALLO 


B/D 


CLAVERACK 


C 


COLEMAN 


C 


CASPIAN* 


B CHANCE 


B/D 


CHINIAK 


A 


CLAMSON 


c 


COLEHANTOMN 


D 


CASS 


A CHANDLER 


B 


CHI NO 


B/C 


CLAVBURN 


B 


COLETO 


A 


CASSAOAGA 


CHANEV 


C 


CHINOOK 


B 


CLAYSPRINGS 


D 


COLFAX 


C 


CASSIA 


C CHANNAHON 


B 


CHIPETA 


D 


CLAYTON 


B 


COLIBRO 


B 


CASSIRO 


C CHANNING 


B 


CHIPLEY 


C 


CLEARFIELD 


C 


COLINAS 


B 


CASSOLARV 


B CHANT* 


B 


CHIPMAN 


D 


CLEAR LAKE 


D 


COLLAMER 


C 


CASSVILLE 


CHANTIER 





CHIPPENY 


D 


CLEEK 


C 


COLLARO 


B 


CASTAIC 


C CHAPIN 


c 


CHIPPEMA 


B/O 


CLE ELUN 


B 


COLLBRAN 


C 


CAST ALIA 


C CHAPMAN 




CHI QUITO 


C/D 


CLEGG 


B 


COLLEEN 


C 


CASTANA 


B CHAPPELL 


B 


CHIRICAHUA 


D 


CLEHAN 


B 


COLLEGIATE 


c 


CASTEU 


C CHARD 


B 


CHI SPA 


B 


CLEMS 


B 


COLLETT 


c' 


CASTILE 


B CHARGO 





CHITINA 


B 


CLEMVILLE 


B 


COLLIER 


A 


CASTING 


C CHARITON 


D 


Chittenden 


c 


CLEORA 


B 


COLLINGTON 


B 


CASTLE 


D CHARITY 


D 


CHITNOOO 


c 


CLERF 


C 


COLLINS 


C 


CASTLEVALE 


CHARLEBOIS 


C 


CHIVATO 





CLERMONT 


D 


COLLINSTON 


c 


CASTNE* 


C CHARLESTON 


C 


CHI NANA 


B 


CLEVERLY 


B 


COLLINSVILLE 


c 


CASTO 


C CHARLEVOIX 


B 


CHO 


C 


CLICK 


A 


COLNA 


B 


CASTRO 


C CHARLOS 


A 


CHOBEE 


D 


CLIFFDOWN 


B 


COLMOR 


6 


CASTROVILLE 


B CHARLOTTE 


A/O 


CHOCK 


B/D 


CLIFFHOUSE 


C 


COLO 


B 


CASUSE 


CHARLTON 


B 


CHOCQLOCCO 


8 


CLIFFORD 


B 


COLOCKUM 


B 


CASWELL 


D CHASE 


C 


CHOPAKA 


C 


CLlFFtfOOD 


C 


COLON* 


A 


CATALINA 


6 CHASEBURG 


6 


CHOPTANK 


A 


CLIFTERSON 


B 


COLOMBO 


B 


CATALPA 


C CHASEVILLE 


A 


CHOPTIE 





CLIFTON 


C 


COLON* 


C 


CATANO 


A CHASKA 


C 


CHORALHONT 


8 


CLlFTY 


B 


COLONIE 


A 


CATARINA 


D CHASTAIN 





CHOSKA 


8 


ClIHARA 





COLORADO 


B 


CATAULA 


C CHATBURN 


B 


CHOTEAU 


C 


CLIMAX 


D 


COLOROCK 


D 


CATANBA 


B CHATFIELO 


C 


CHRISTIAN 


C 


CLIME 


C 


COLOSO 


D 


CATH 


CHATHAM 


B 


CHRISTIANA 


8 


CLINTON 


B 


COLOSSE 


A 


CATHCART 


C CHATSttORTH 


D 


CHRIST I ANBURG 


D 


CLIPPER 


B/C 


COLP 


D 


CATHEDRAL 


D CHAUNCEY 


C 


CHRISTY 


8 


CLODINE 


D 


COLRAIN 


B 


CATHERINE 


B/O CHAVIES 


6 


CHROME 


c 


CLONTARP 


B 


COLTON 


A 


CATHRO 


CHAWANAKEE 


C 


CHUALAR 


8 


CLOQUALLUM 


C 


COLTS NECK 


B 


CATLETT 


C/D CHEADLE 


C 


CHUBBS 


C 


CLOOUATO 


6 


COLUMBIA 


B 


CATLIN 


B CHECKETT 





CHUCKANALLA 


8 


CLOOUET 


B 


COLUMBINE 


A 


CATNIP 


CHEDEHAP 


B 


CHUGTER 


8 


CLOUD 


D 


COLUS* 


C 


CATOCTIN 


C CHEEKTONAGA 


D 


CHULITNA 


B 


CLOUDCROFT 





COLVILLE 


B/C 


CATOOSA 


B CHEESENAN 


C 


CHUMMY 


C/O 


CLOUD PEAK 


C 


C3LVIN 


C 


CAT SKILL 


A CHEHALEN 


C 


CHUHSTICK 


C 


CLOUD RIM 


B 


COLWOOO 


B/D 


CATTARAUGUS 


C CHEHALIS 


B 


CHUPADERA 


C 


CLOUGH 





COLY 


B 


CAUDLE 


8 CHEHUIPUM 


D 


CHURCH 


D 


CLOVERDALE 


D 


COLTER 


C/D 


CAVAL 


B CHELAN 


B 


CHURCHILL 


£> 


CLOVER SPRINGS 


B 


COMER 


B 


CAVE 


CHELSEA 


A 


CHURCHVILLE 


D 


CLOVIS 


B 


COMERIO 


B 


CAVELT 


CHEMAHA 


B 


CHURN 


B 


CLUFF 


C 


COMET* 


D 


CAVE ROCK 


A CHEMUNG 




CHURNDASHER 


B 


CLUN I E 





COMFREY 


C 


CAVO 


D CHEN 





CHUTE 


A 


CLURDE 


C 


COHITAS 


A 


CAVOOE 


C CHENA 


A 


CIALES 


D 


CLURO 


C 


COMLY 


C 


CAVOUR 


CHENANGO 


A 


CIBEQUE 


8 


CLYDE 





COMMERCE 


C 


CANKER 


B CHENEY 


B 


CI BO 





Clvmer 


B 


COMO 


A 


CAVA6UA 


C CHENNEBV 


C 


CIBOLA 


8 


COACH&LA 


B 


CONODORE 


8 


CAVLOR 


B CHENOHETH 


8 


CICERO 


b 


COAD 


B 


COMORO 


B 


CAYUGA 


C CHE QUE ST 


C 


CIDRAL 


C 


COAL CREEK 


D 


COMPTCHE 


B 


CAZAOERO 


C CHEREETE 


A 


CIENEBA 


c 


COAL MONT 


C 


COMPTON 


C 


CAIAOOR 


B CHERIONI 


D 


CIMA 


c 


COAMO 


C 


COMSTOCK 


C 


CAZENOVIA 


B CHEROKEE 





CIMARRON 


c 


COARSEGOLD 


B/C 


COMUS 


B 


CEBOLIA 


C CHERRY 


c 


CINCINNATI 


c 


COAT I COOK 


c 


CONALB 


a 


CEBONE 


C CHERRVHILL 


B 


CINCO 


A 


COATS BURG 


D 


CONANT 


c 


CECIL 


B CHERRY SPRINGS 


C 


CINDERCONE 


B 


COBB 


B 


CONASAUGA 


c 


CEDA 


B CHESAN 


A 


CINE BAR 


B 


COBEN 





CONATA 


D 


CEOARAN 


CHESHIRE 


B 


CINTRONA 


D 


COBEY 


B 


CONBOY 


D 


CEDAR BUTTE 


C CHESHNINA 


C 


CIPRIANI! 


D 


COBURG 


C 


CONCHAS 


C 


CEDAREDGE 


B CHESNINNUS 


B 


CIRCLE 


C 


COCHETOPA 


C 


C0MCH3 


C 


CEDAR MOUNTAIN 


D CHESTER 


B 


CIRCLEVILLE 


C 


COCOA 


A 


CONCONULLV 


B 


CEDAR V ILLE 


• CHESTERTON 


C 


CISNE 





COCO L ALL A 


C 


CONCORD 





CEDON1A 


B CHE TCO 





CISPUS 


A 


CJDOKUS 


c 


CONCREEK 


6 


CEDRON 


C/D CHETEK 


8 


CITICO 


B 


CODY 


A 


COND* 


C 


CELAVA 


B CHEVELON 


C 


CLACKAMAS 


C 


SOE 


A 


CONDI T 





CELETON 


CHE MAC LA 


C 


CLAIBORNE 


B 


COEBURN 


C 


CONDON 


C 


CELINA 


C CHE MELAH 


B 


CLAIRE 


A 


COEfcOCK 


D 


CONE 


A 


CELIO 


A/D CHEYENNE 


B 


CLAIRE MONT 


B 


COFF 


D 


CONEJO 


C 


CELLAR 


D CHIARA 





CLALLAM 


C 


COFFEEX 


B 


CONESTOG* 


B 


CENCOVE 


B CHICKASHA 


B 


CLAM GULCH 





COGGON 


B 


CO^ESUS 


B 


CENTER 


C CHICUPEE 


B 


CLAMO 


c 


COGS* ELL 


C 


CONGAREE 


6 


CENTER CREEK 


B CHI COTE 


D 


CLANTLiN 


c 


COHASSET 


B 


CONGER 


B 


CENTERF1ELD 


B CHIGLEY 


C 


CLAPPER 


3 


COHOCTAH 





CON I 


D 


CENTERVILLE 


D CHILCCTT 





CLAREMURE 





COHOt 


B 


CONKLIN 


B 


CENTRALIA 


B CHILDS 


B 


CLARENCE 





COIT 


C 


C3NLEN 


B 


NJTES 


A BLANK HVDROLOGIC 


SOIL 


GROUP INDICATES 


THE SOIL GROUP HAS NOT 


BEEN 


DETERMINED 




TOO SOIL GROUPS SUCH AS 


B/C INDICATES THE DRAINEO/UNORA1NED SITUATION 







NEH Notice U-102, August 1972 



127 



Table A3, (continued). 



CONLEY 


C 


COURT 


B 


CROWLEY 


D 


OANSK IN 


B 


DELLROSE 


8 


CONNEAUT 


c 


COURTHOUSE 





CROWN 


B 


DANT 


D 


DELI 





CONNECTICUT 




COURTLANO 


B 


CROWSHAW 


8 


DANVERS 


C 


DELNAR 


D 


CONNERTON 


B 


COURTNEY 


D 


CROZIER 


C 


DANVILLE 


C 


DELMITA 


C 


CONOTTON 


8 


COURTROCK 


8 


CRUCES 





OANZ 


B 


DELMONT 


8 


CONOVER 


B 


COUSE 


C 


CRUCKTON 


b ; 


DARCO 


A 


DELNORTE 


C 


CONOHINGO 


c 


COUSHATTA 


B 


CRUICKSHANK 


C 


DARGOL 


D 


DELPHI 


B 


CONRAD 


B 


COVE 


D 


CRUHE 


B 


OARIEN 


C 


DELPHILL 


C 


CONROE 


B 


COVEILO 


8 


CRUMP 


D 


DARLING 


B 


OELPIEDRA 


C 


CONSER 


C/D 


COVE LAND 


C 


CRUTCH 


B 


OARNELL 


C 


DELPINE 


D 


CONSTABLE 


A 


COVELLO 


B/C 


CRUTCHER 


D 


DARN EN 


B 


DELRAY 


A/0 


CONSTANCIA 


D 


COVENTRY 


6 


CRUZE 


C 


OARR 


A 


DEL REY 


C 


CONSUHO 


B 


COVEYTOHN 


C 


CRYSTAL LAKE 


B 


GARRET 


C 


DEL RIO 


6 


CONTEE 


D 


COVINGTON 





CRYSTAL SPRINGS 


D 


DARROCH 


C 


DELSON 


€ 


CONTINE 


C 


COHAN 


A 


CRYSTOLA 


B 


OARROUZETT 


C 


DELTA 


C 


CONTINENTAL 


C 


COHARTS 


C 


CUBA 


B 


DART 


A 


OELWDN 


B 


CONTRA COSTA 


C 


CONDEN 





CU8ERANT 


B 


DARVADA 


D 


DELWIN 


A 


CONVENT 


C 


COWDREY 


C 


CUCHILLAS 


D 


DARWIN 


D 


DELVNDIA 


A 


COOK 


D 


COHEEMAN 





CUDAHY 


D 


OASSEL 


D 


DEMAST 


B 


COOKPORT 


C 


COWERS 


8 


CUERO 


B 


DAST 


C 


DE MASTERS 


B 


COOLBRITH 


B 


COWETA 


C 


CUEVA 





DAT EM AN 


C 


DE MAYA 


C 


COOLIDGE 


B 


COWICHE 


8 


CUEVITAS 





DATINO 


C 


DEHERS 





COOLVILLE 


C 


COWOOD 


C 


CULBERTSON 


8 


OATWVLER 


C 


DEMKY 





COOHBS 


6 


COX 


D 


CULLEN 


C 


DAULTON 


D 


DEMONA 


C 


COONEY 


B 


COXVIU.E 





CULLEOKA 


B 


DAUPHIN 




DEMOPOLIS 


C 


COOPER 


C 


COY 





CULLO 


C 


OAVEY 


A 


DEHPSEV 


B 


COOTER 


c 


COYATA 


C 


CULPEPER 


C 


DAVIDSON 


B 


DEMPSTER 


B 


COP ARE 


B 


COZAD 


B 


CULVERS 


C 


DAVIS 


B 


OENAV 


B 


COPAL IS 


B 


CRAB TON 


B 


CUMBERLAND 


B 


DAVISON 


B 


DENHAWKEN 


D 


COP EL AND 


8/0 


CRADDOCK 


8 


CUMLEY 


C 


DAVTONE 


B 


DENS SON 


C 


COPITA 


B 


CRADLEBAUGH 


D 


CUNNINGS 


B/D 


OAWES 


C 


DENMARK 


D 


COPLAY 




CRAFTON 


C 


CUNOIVO 


B 


DAWHOO 


B/D 


OENNIS 


C 


COPPER RIVER 


D 


CRAGO 


8 


CUNICO 


C 


DAWSON 





DENNY 


D 


COPPERTON 


6 


CRAGOLA 


D 


CUPPER 


8 


DAXTY 


C 


DENROCK 


D 


COPPOCK 


B 


CRAIG 


C 


CUR ANT 


B 


OAY 


D 


DENTON 


D 


COPSEY 





CRAIGNONT 


C 


CURDLI 


C 


OAVBELL 


A 


DENVER 


C 


COOUILLE 


C/D 


CRAIGSVILLE 


A 


CURECANTI 


B 


DAYTON 


D 


DEODAR 


D 


CORA 





CRAMER 


D 


CURHOLLOW 





OAYVILLE 


B/C 


DEPEW 


C 


CORAL 


C 


CRANE 


8 


CURLEW 


c 


DAZE 


D 


DEPOE 





CORBETT 


B 


CRANSTON 


B 


CUR RAN 


c 


DEACON 


8 


DEPORT 


D 


CORBIN 


8 


CRARY 


C 


CURTIS CREEK 


D 


OEADFALL 


B 


DERA 


B 


CJRCEGA 


C 


CRATER LAKE 


8 


CURTIS SIDING 


A 


DEAMA 


C 


DERINDA 


C 


CORD 


C 


CRAVEN 


C 


CUSHING 


B 


DEAN 


C 


DERR 


c 


CORDES 


8 


CRAWFORD 


D 


CUSHMAN 


c 


DEAN LAKE 


C 


DERRICK 


8 


CORDOVA 


C 


CREAL 





CUSTER 


c 


DEARDURFF 


B 


DESAN 


A 


CORINTH 


C 


CREBBIN 


C 


CUTTER 





DEARY 


C 


DESART 


C 


CORKINDALE 


8 


/CREDO 


C 


CUTZ 


D 


DEARY TON 


B 


DESCALABRADO 





CORLENA 


A 


CREEDHAN 





CUYAMA 


B 


OEATNAN 


C 


DESCHUTES 


C 


CORLETT 


8 


CREEDMOOR 


c 


CUV ON 


A 


OEAVER 


c 


DESERET 


C 


CORLEY 


C 


CREIGHTON 


8 


CYAN 


D 


0E8ENGER 


c 


DESERTER 


B 


CORHANT 


c 


CRELDON 


B 


CYLINDER 


8 


DEBORAH 


D 


DESHA 





CORNHILL 


B 


CRESBARO 


C 


CYNTHIANA 


C/D 


OECAN 


D 


DESHLER 


C 


CORNING 


D 


CRESCENT 


B 


CYPREMORT 


C 


OECATHON 


D 


DESOLATION 


c 


CORNISH 


8 


CRESCO 


C 


CYRIL 


B 


DECATUR 


B 


DESPAIN 


B 


CORNUTT 


C 


CRESPIN 


C 






DECCA 


8 


DETER 


c 


CORNVILLE 


8 


CREST 


C 


DABOB 


B 


DECKER 


c 


DETLOR 


c 


COROZAL 


C 


CRESTLINE 


B 


OACONO 


C 


OECKERVILLE 


c 


DETOUR 


c 


CORPENING 


D 


CRESTMORE 




DACOSTA 





OECLO 


B 


DETRA 


B 


CORRAL ITOS 


A 


CRESTON 


A 


DADE 


A 


DECOR RA 


B 


DETROIT 


c 


CORRECO 


C 


CRE SWELL 


C 


DAFTER 


B 


DECROSS 


B 


DEV 


B 


CORRERA 





CRETE 


D 


DAGFLAT 


C 


D6E 


C 


DEVILS DIVE 


D 


CORSON 


C 


CREVA 





DAGGETT 


A 


DEEPNATER 


C 


DEVOE 


D 


CORTADA 


B 


CREVASSE 


A 


DAGLUM 





DEER CREEK 


C 


DEVOIGNES 


C/D 


CORTEZ 





CREWS 


D 


DAGOR 


B 


OEERFIELO 


B 


DEVOL 


B 


CORTINA 


A 


CRIDER 


B 


DAGUAO 


C 


DEERFORD 


D 


DEVON 


B 


CORUNNA 





CRIH 


B 


OAGUEY 


c 


DEER IMG 


B 


DEVORE 


B 


CORVALLIS 


8 


CRISFIELD 


B 


DAHLOUIST 


B 


DEERLOOGE 


D 


DEVOV 


D 


CORMIN 


B 


CRITCHELL 


8 


DAIGLE 


C 


DEER PARK 


A 


DEWART 




CORY 


C 


CRIVITZ 


A 


DA I LEY 


A 


OEERTON 


B 


DEWEY 


B 


CORYDON 


C 


CROCKER 


A 


DAKOTA 


B 


OEERTRAIL 


C 


DEWVILLE 


B 


COSAO 


C 


CROCKETT 





OALBO 


B 


DEFIANCE 





DEXTER 


B 


COSH 


c 


CROEStS 


C 


DALBY 


D 


OEFORO 


D 


DIA 


C 


COSHOCTON 


c 


CROFTON 


B 


OALCAN 


C 


DEGARNO 


B/C 


DIABLO 


D 


COSKI 


B 


CROGHAN 


B 


DALE 


B 


D6CNER 


C 


OIAMOND 





COSSAVUNA 


c 


CROOKED 


C 


DALHART 


B 


OE GREY 





DIAMOND SPRINGS 


C 


COSTILLA 


A 


CROOKED CREEK 





DALIAN 


8 


OEJARNET 


B 


DIAHONDVILLE 


c 


COIACO 


C 


CROOKSTON 


B 


DALLAM 


6 


DEKALB 


C 


DIANEV 


c 


COTATI 


c 


CROOH 


B 


DALTON 


C 


OEKDVEN 





DIANOLA 


D 


COTITO 


c 


CROPLEY 





DALUPE 


B 


DELA 


B 


DIAZ 


c 


COTO 


c 


CROSBY 


C 


DAMASCUS 





OELAKE 


B 


DIBBLE 


c 


COTOPAXI 


A 


CROSS 





DAMON 


D 


DELANCO 


C 


DICK 


A 


COTT 


B 


CROSSVILLE 


8 


DANA 


B 


OELANEY 


A 


DICKEY 


A 


COTTER 


B 


CROSWELL 


A 


DANBURV 


C 


OELANO 


B/C 


DICKINSON 


A 


COTTERAL 


B 


CROT 


D 


0AN8V 




DELECO 


D 


DICKSON 


C 


COTTIER 


B 


CROTOK 





DANDREA 


C 


OELENA 





DIGBV 


c 


COTTON WOOO 


c 


CROUCH 


B 


DANDRIDGE 





D6LFINA 


B 


DIGGER 


c 


COTTRtLL 


c 


CROW 


C 


DANGBERG 





DELHI 


A 


OIGHTON 


• 


COUCH 


c 


CROW CREEK 


B 


DANIC 


c 


OEM CIAS 


B 


DILL 


B 


COUGAR 





CROWFOOT 


B 


DANIELS 


B 


OELKS 


B/D 


DILLARD 


C 


COULSTONE 


B 


CROWHEART 





DANKO 





OELL 


C 


DILLOOWN 




COUNTS 


c 


CROW HEART 


D 


OANLEV 


C 


DELLEKER 


B 


DILLINGER 


B 


COUPEVILLc 


c 


CROW HILL 


C 


DANNEHORA 





OELLO 


A/C 


DILLON 


D 


NOTES 


A 


BLANK HYDROLOGIC 


SOIL 


GROUP INDICATES 


THE SOIL GROUP HAS NOT 


BEEN 


3ETERMINED 




TMO SOIL GROUPS SUCH AS 


B/C 


INDICATES THE OR AI NE6/UNDRAINE0 SITUATI3* 







NEH Notice U-102, August 1972 



128 



Table A3, (continued). 



DILLHVN 


A 


DOUGHTY 


A 


DU PAGE 


B 


EGBERT 


B/C 


EMILY 


8 


OILMAN 


C 


DOUGLAS 


B 


DUPEE 


C 


EGELANO 


B 


EHLIN 


B 


GILTS 


D 


DOURO 


B 


DUPLIN 


C 


EGGLESTON 


B 


EMMA 


C 


DILUORTH 





DOVER 


B 


DUPO 


C 


EGNAR 


C 


EMNERT 


A 


DINAL 





OOVRAY 


D 


DUPONT 


D 


EICKS 


C 


EMMET 


8 


DIHYAU 


C 


DOM 


B 


DUPREE 


D 


EIFORT 


C 


EMN3NS 


C 


DINGLE 


B 


OOWAGIAC 


B 


DURALDE 


C 


EKAH 


C 


EMORY 


B 


OINGLISHNA 


D 


DOHDEN 


C 


DURANO 


B 


EKALAKA 


B 


EMPEDRADO 


C 


OINKELNAN 


B 


DOMELLTON 





DURA NT 


D 


ELAM 


A 


EMPEV 


B 


DINKEY 


A 


DOWNER 


B 


OURELLE 


B 


ELBERT 


D 


ENPEVVILLE 


C 


OINNEN 


B 


DOWNEY 


B 


DURHAM 


B 


ELBURN 


B 


EMPIRE 


c 


OINSOALE 


B 


DOWNS 


B 


DURKEE 


C 


ELCO 


B 


EMRICK 


B 


01 NUBA 


B/C 


DOXIE 


C 


DUROC 


8 


ELO 


B 


ENCE 


B 


OINZER 


B 


OOYCE 


C 


DURRSTEIN 


D 


ELDER 


B 


ENCIERRO 


D 


010XICE 


B 


DOYLE 


A 


DUST ON 


B 


ELDER HOLLOW 


D 


ENCINA 


B 


OIPMAN 





DOYLE STOWN 





DUTCHESS 


B 


ELDERON 


B 


EMBERS 


C 


OIQUE 


B 


DOYN 


C 


OUT SON 


D 


ELDON 


B 


ENDERSBY 


B 


OISABEL 


D 


DRA 


c 


OUT TON 





ELDORADO 


C 


ENDICOTT 


C 


01SAUTEL 


B 


DRACUT 


C 


DUVAL 


B 


ELDRIDGE 


C 


ENET 


B 


DISCO 


B 


DRAGE 


6 


DUZEL 


B 


ELEPHANT 





ENFIELD 


B 


OISHNER 


D 


DRAGOON 


B 


DWIGHT 


D 


ELEROY 


B 


ENGLE 


8 


DISTERHErF 


C 


DRAGS TON 


C 


OWYER 


A 


ELFRIDA 


B 


ENGLESIDE 


8 


D1TCHCAMP 


c 


DRAHAT 





DYE 





ELIJAH 


C 


ENGLEWOOD 


C 


OITHOO 


c 


DRAIN 


D 


DYER 




ELIOAK 


C 


ENGLUND 


D 


OIVERS 


B 


DRAKE 


B 


DYKE 


B 


ELK 


B 


ENNIS 


B 


DIVIDE 


B 


DRANYON 


B 


DYRENG 





ELKAOER 


B 


ENOCHVILLE 


B/D 


DIX 


A 


DRAPER 


C 






ELKCREEK 


C 


ENOLA 


B 


DIXIE 


C 


ORE SOEN 


B 


EACHUSTON 


D 


ELK HOLLOW 


B 


ENON 


C 


DIXHONT 


c 


DRESSLER 


C 


EAO 


C 


ELKHORN 


B 


ENOREE 





DIXMORE 


B 


DRENS 


e 


EAGAR 


B 


ELKINS 


D 


ENOS 


B 


DIXONVILLE 


c 


OREXEL 


B 


EAGLECONE 


B 


ELKINSVILLE 


B 


ENOSBURG 


D 


DIXVILLE 


A 


DRI F TON 


c 


EAKIN 


B 


ELKMOUND 


C 


ENSENADA 


B 


DOAK 


B 


DRIGGS 


B 


EAMES 


B 


ELK MOUNTAIN 


B 


ENSIGN 


D 


DO BBS 


c 


DRUM 


C 


EARLE 


D 


ELKOL 





ENSLEY 


D 


DJBEL 


D 


DRUMMER 


B 


EARLMONT 


B/C 


ELKTON 


D 


ENSTROM 


B 


OOBROM 





DRUMMONO 


D 


EARP 


B 


ELLABELLE 


B/D 


ENTENTE 


8 


DOBY 





ORURY 


6 


E AS LEV 





ELLEDGE 


C 


ENTERPRISE 


B 


DOCAS 


B 


DRYAD 


C 


EAST FORK 


C 


ELLERY 


D 


ENTIAT 


D 


DOCKERY 


C 


DRY6URG 


B 


EAST LAKE 


A 


ELLETT 





ENUMCLAW 


C 


DOCT 


B 


DRY CREEK 


C 


EASTLAND 


C 


ELLIBER 


A 


EPHIUIM 


C 


DODGE 


B 


ORYDEN 


B 


EAST ON 


C 


ELLICOTT 


A 


EPHRATA 


B 


OOOGEVILLE 


B 


DRY LAKE 


C 


EASTONVILLE 


A 


ELLINGTON 


B 


EPLEY 


B 


000 SON 


C 


DUANE 


B 


EAST PARK 


D 


ELLINOR 


C 


EPOUFETTE 


D 


DOGER 


A 


DUART 


C 


EASTPORT 


A 


ELLIOTT 


C 


EPPING 





OOGUE 


C 


DUBAKELLA 


C 


EATONTOHN 




ELLIS 


D 


EPSIE 


D 


OOLANO 


B 


OUBAY 





EAUGALLIE 


B/D 


ELLISFOROE 


C 


ERA 




OOLE 


C 


DUBBS 


B 


EBA 


C 


ELLISON 


B 


ERAN 




DOLLAR 


B 


DUBOIS 


C 


EBBERT 


D 


ELLOAM 


D 


ER6ER 




OOLLARO 


C 


DUBUQUE 


B 


EBBS 


6 


ELLSBERRV 


C 


ERIC 




DOLORES 


B 


DUCEV 


B 


EBENEZER 


C 


ELLSWORTH 


c 


ERIE 




OOLPH 


C 


DUCHESNE 


B 


ECCLES 


B 


ELLUM 


c 


ERIN 




DONEZ 


c 


DUCKETT 


C 


ECHARD 


C 


ELMA 


B 


ERNEST 




DOMINGO 


C 


DUCOR 


D 


ECHLER 


B 


ELMDALE 


B 


ERN3 




00H1NGUEZ 


C 


DUDA 


A 


ECKERT 


D 


ELMENDORF 


D 


ERiUMOUSPE 




DOMINIC 


A 


DUDLEY 


D 


ECKLEV 


B 


ELMIRA 


A 


ESCABOSA 




DOMINO 


c 


DUEL 


B 


ECKNAN 


B 


ELMO 


C 


ESCAL 




OOHINSON 


A 


DUELM 


C 


ECKRANT 


D 


ELMO NT 


B 


ESCALANTE 




OONA ANA 


B 


DUFFAU 


B 


ECTOR 


D 


ELMORE 


B 


ESCAMBIA 




DONAHUE 


C 


DUFFER 





EOALGO 


C 


ELMWOOD 


C 


ESCONDIOO 




DONALD 


B 


DUFF I ELD 


8 


EDDS 


B 


ELNORA 


B 


ESMOND 




DONA VAN 


B 


DUFFSON 


6 


EDDY 


C 


ELOIKA 


B 


ESPARTO 




OONEGAL 




DUFFY 


B 


EDEN 


C 


ELPAN 


D 


ESPIL 




OONERAIL 


C 


DUFUR 


B 


EDENTON 


C 


EL PECO 


C 


ESPINAL 




OONEY 


C 


DUGGINS 





EDENVALE 


D 


EL RANCHO 


B 


ESPLIN 




OONICA 


A 


DUGOUT 


D 


EDGAR 


B 


ELRED 


B/D 


ESPY 




DONLONTON 


C 


DUG NAY 





EDGECOMBE 


B 


ELROSE 


• 


E SQUAT ZEL 




DONNA 





OUKES 


A 


EDGE LEY 


C 


ELS 


A 


ESS 




OONNAN 


C 


OULAC 


C 


EOGEMONT 


B 


ELSAH 


B 


ESSEN 




DONNA ROO 


B 


DUMAS 


B 


EDGEWATER 


C 


ELSINBORO 


B 


ESSEX 




OONNYBROOK 





DUMECO 


C 


EDGE WICK 


B 


ELSINORE 


A 


ESSEXVILLE 




DONOVAN 


B 


DUMONT 


B 


EDGE WOOD 


A 


ELSMERE 


A 


ESTACAOO 




OOOLEY 


A 


DUNBAR 


D 


EDGINGTON 


C 


ELSO 


D 


ESTELLINE 




OOONfc 


B 


DUNBARTON 


C 


EDINA 


D 


EL SOLYO 


C 


ESTER 




DOOR 


B 


DUNBR1DGE 


B 


EDINBURG 


C 


ELSTON 


B 


ESTER6R0OK 




OJRA 





DUNCAN 


D 


EDISON 


B 


ELTOPIA 


B 


ESTHERVILLE 




DORAN 


C 


OUNCANNON 


B 


EDISTO 


C 


ELTREE 


B 


ESTIVE 




DORCHESTER 


6 


DUNCOM 


D 


EDITH 


A 


ELTSAC 


D 


ESTO 




OQROSHIN 


D 


DUNDAS 


C 


EDLOE 


B 


ELWHA 


B 


ESTRELLA 




OOROTHEA 


C 


DUNUAV 


A 


EDMONDS 


D 


ELWOOD 


C 


ETHAN 




DOROVAN 





DUNDEE 


C 


EC MORE 


D 


ELY 


B 


ETHETE 




OORS 


a 


DUNcLLEN 


B 


EDMUND 


C 


ELYS I AN 


B 


ETHRIDGE 




DORSET 


B 


DUNE SAND 


A 


EDNA 





ELZINGA 


B 


ETIL 




DOS CABEZAS 


C 


OUNGENESS 


B 


EONEYVILLE 


B 


ENBCEN 


B 


ETNA 




DOSS 


C 


DUN GLEN 


C 


EOOH 


C 


ENBRY 


B 


ET3E 




DOSSMAN 


B 


DUNK1NSVILLE 


B 


EOROY 





EMBUDO 


B 


ET3WAH 




OOTEN 





DUNKIRK 


6 


ED SON 


C 


EMOENT 


C 


ETOWN 




DOTHAN 


B 


DUNLAP 


B 


EDWARDS 


B/D 


EMER 


C 


ETSEL 




OOTTA 


B 


OUNMORE 


B 


EEL 


C 


EMERALD 


B 


ETTA 




DOTY 


B 


DUNNING 


C 


EFFINGTON 





EMERSON 


B 


ETTER 




DOUBLETOP 


B 


DUNPHV 


C 


EFWUN 


A 


EM IDA 


D 


ETTERSBURG 


B 


DOUDS 


B 


OUNUL 


A 


EGAM 


C 


EMIGRANT 


B 


ETTRICK 


D 


DOUGHERTY 


A 


OUNVILLE 


B 


EGAN 


e 


EMIGRATION 


D 


EUBANK S 


B 


NOTES A 


BLANK HYOROLOGIC 


SOIL 


GROUP INDICATES THE SOIL GROUP HAS NOT 


BEEN 


DETERMINED 






TWO SOIL GROUPS SUCH AS 


B/C 


INDICATES THE 0RA1NE0/UN0RAINED SITUATION 







NEH Notice U-102, August 1972 



129 



Table A3, (continued). 



EUOORA 


B 


FE 


D 


FLOHELL 


C 


FRENCH 


C 


GARLOCK 


C 


EUFAULA 


A 


FEDORA 


B 


FLOUEREE 


B 


FRENCHTOMN 


D 


GAR HON 


C 


EUREKA 





FELAN 


A 


FLOVO 


B 


FRENEAU 


C 


GARNORE 


B 


EUST1S 


A 


FELDA 


e/o 


FLUETSCH 


C 


FRESNO 


C/D 


GARNER 





EUTAH 





FELIDA 


B 


FLUSHING 




FRIANA 


D 


GARO 


D 


EVANGELINE 


c 


FELKER 


D 


FLUVANNA 


C 


FRIANT 


D 


GARR 





EVANS 


6 


FELLOWSHIP 





FLVGARE 


6 


FRIOLO 


C 


GARRARD 


8 


EVANSTON 


B 


FELT 


B 


FLYNN 





FRIEDMAN 


B 


GARRETSON 


8 


EVARO 


A 


FELTA 


C 


FOARD 





FRIENDS 


D 


GARRETT 


B 


EVART 





FELTHAM 


A 


FOGELSVILLE 


8 


FRIES 


D 


GARRISON 


B 


EVENDALE 


C 


FELTON 


B 


FOLA 


8 


FRINOLE 


B 


GARTON 


C 


EVERETT 


B 


FELTONIA 


B 


FOLEY 


D 


FRIO 


B 


GARWIN 


C 


EVERGLADES 


A/D 


FENCE 


B 


FONDA 





FRIZZELL 


C 


GASCONADE 





EVERLV 


B 


FENOALL 


C 


FONDIS 


C 


FROBERG 


D 


GAS CREEK 


c 


EVERHAN 


C 


FENNOOO 


B 


FONTAL 





FROHHAN 


C 


GASKELL 


c 


EVERSON 





FERA 


C 


FONTREEN 


8 


FRONDORF 


c 


GASS 


D 


EVESBORO 


A 


FERDELFORO 


c 


FOPIANO 





FRONHOFER 


c 


GASSET 


D 


EMA 


B 


FERDI6 


c 


FORBES 


B 


FRONTON 





GATESBURG 


A 


EMAIL 


A 


FEROINAND 


c 


FORD 





FROST 


D 


GATE SON 


C 


EMALL 


A 


FERGUS 


B 


FORDNEY 


A 


FRUITA 


B 


6ATEVIEW 


8 


EWINGSVIU.E 


B 


FERGUSON 


B 


FORDTRAN 


C 


FRUIT LAND 


B 


GATEWAY 


C 


EXCELSIOR 


B 


FERNAMDO 


B 


FOROVILLE 


B 


FRVE 


C 


GATEWOOD 





EXCHEQUER 


D 


FERN CLIFF 


B 


FORE 


D 


FUEGO 


C 


GAULDV 


B 


EXETER 


C/D 


FERNDALE 


B 


FORELAND 


D 


FUERA 


C 


GAVINS 


C 


EXLINE 


D 


FERNLEV 


c 


FORELLE 


8 


FUGAHEE 


B 


GAVIOTA 





EXRAV 


D 


FERNOW 


B 


FORESMAN 


B 


FULCHER 


C 


GAY 





EXUM 


C 


FERNPCINT 


C 


FORESTOALE 





FULDA 


c 


GAVLORO 


B 


EVERBOM 


D 


FERRELO 


■ 


FORESTER 


C 


FULLERTON 


B 


GAVNOR 


C 


EVRE 


B 


FERAIS 


a 


FORE ST ON 


C 


FULNER 


B/D 


GAVVILLE 


B 






FERRON 


> 


FORGAV 


A 


FULSHEAR 


c 


GAZELLE 





FA8IUS 


B 


FERTA4.INE 





FORMAN 


B 


FULTON 


D 


GAZOS 


B 


FACE VILLI 


B 


FESTINA 


8 


FORNEY 


) 


FUQUAY 


B 


GEARHART 


A 


FAHEV 


B 


FETT 





FORREST 


I 


FURNISS 


B/D 


GEARY 


8 


FAIN 


C 


FETTIC 


D 


FORSEY 


C 


FURY 


B/D 


GEE 


8 


FAINES 


A 


FIANOER 


C 


FORSGREN 


C 


FUSUL INA 


C 


GEEBURG 


C 


FAIRBANKS 


B 


FIBEA 


D 


FORT COLLINS 


B 






6EER 


C 


FAIROALE 


B 


FIDAL60 


c 


FORT DRUM 


C 


GAASTRA 


c 


GEFO 


A 


FAIRFAX 


B 


FIDOL6T0WN 


c 


FORT LYON 


8 


GABALDON 


B 


GELKIE 


B 


FAIRFIELD 


B 


FIDDYNENT 


c 


FORT MEADE 


A 


GABBS 


D 


GEM 


C 


FAIRHAVEN 


B 


FIELDING 


B 


FORT NOTT 


A 


GABEL 


c 


GEHID 


c 


FAIRNOUNT 


D 


FIELDON 


B 


FORT PIERCE 


C 


GABICA 





GEMSON 


c 


FAIRPORT 




FIELDSON 


A 


FORT ROCK 


c 


GACEY 





GENESEE 


B 


FAIRTDELL 




FIFE 


B 


FORTUNA 





GACHADO 


D 


GENEVA 


C 


F AJAR DO 




FIFER 


D 


FORTMINGATE 


c 


GADDES 


C 


GENOA 


D 


FALAYA 




FILLHORE 





FORWARD 


c 


GADES 


G 


GENOLA 


B 


FALCON 




FINCASTLE 


C 


FOSHOME 


B 


GADSDEN 


D 


GEORGE VI LLE 


B 


FALFA 




FINGAl 


c 


FOSSUM 


B 


GAGE 




GEORGIA 


B 


FALFURRIAS 




FINLEV 


B 


FOSTER 


B/C 


GAGEBY 


a 


GERALD 


D 


FALK 


B / F 


B 


FOSTORIA 


8 


GAGETOHN 




GERBER 





FALKNER 




FIRGRELL 


B 


FOUNTAIN 





GAHEE 




GERIG 


B 


FALL 




FIRMAGE 


• 


FOURLOG 





GAINES 




GERING 


8 


FALLBROOK 


B/C 


FIRO 


.0 


FOURMILE 


B 


GAINESVILLE 




GERLAND 


C 


FALLON 




FIRTH 


B/C 


FOUR STAR 


B/C 


GAL AT A 




GERMAN I A 




FALLSBURG 




FISH CREEK 


a 


FOUTS 


8 


GALE 




GERMANY 


B 


FALLSINGTON 




FISHERS 


B 


FOX 


8 


GALEN 




GERRARO 





FANCHER 




FISHHOOK 





FQXCREEK 


B/D 


GALENA 




GESTRIN 


B 


FANG 




FISHKILL 




FOXHOUNT 


C 


GALEPPI 




GETTA 


C 


FANNIN 




FITCH 


A 


FOXOL 


D 


GALESTOUN 




GETTYS 


c 


FANNO 




FITCHVILLE 


C 


FOXPARK 


D 


GALETON 




GEYSEN 


D 


FANU 




FITZGERALD 


B 


FOX PARK 





GALEV 




GHENT 


C 


FARADAY 




FITZHUGH 


B 


FOXTON 


C 


GALISTEO 




GIBBLER 


C 


FARALLONE 




FIVE DOT 


B 


FRAILEY 


8 


GALLAGHER 




GIBBON 


B 


FARAHAV 


D 


FIVEMILE 


B 


FRAN 


8 


GALLATIN 




GIBBS 





FARB 





FIVES 


B 


FRANCIS 


A 


GALL EGOS 




GIBBSTOWN 


A 


FARGO 





FLAGS 


B 


FRANCITAS 





GALL INA 




CIFFIN 


C 


FARISITA 




FLAGSTAFF 


C 


FRANK 


D 


GALL ION 




GIFFORD 


c 


FARLAND 




FLAK 


B 


FRANKFORT 





GALVA 




GILA 


8 


FARMING TON 


C/D 


FLANIMG 


B 


FRANKIRK 


C 


GALVESTON 




GILBV 


B 


FARNHAN 




FLAMINGO 





FRANKLIN 


a 


GALVEZ 




GILCHRIST 


8 


FARNHAHTON 


B/C 


FLANAGAN 


B 


FRANKSTOMN 


8 


GALVIN 




GILCREST 


8 


FARNUF 




FLANDREAU 


B 


FRANKTOHN 





GALMAV 




GILEAO 


C 


FARNUN 




FLASHER 


A 


FRANKVIUE 


a 


GAMBLER 




GILES 


8 


FARRAGUT 




FLATHEAD 


A 


FRATERNIDAD 





6AHB0A 




GILFORD 


B/D 


FAARAR 




FLAT HORN 


• 


FRAZER 


c 


GANNETT 


D 


6ILH0ULV 


a 


FARRELL 




FLATTOP 





FRED 


c 


GANSNER 


D 


GILISPIE 


c 


FARRENBURG 




FLATMLLOU 


B 


FAEDENSBORG 


c 


GAPO 


D 


GILLIAM 


c 


FARROT 




FLAXTON 


A 


FREDERICK 


8 


GAPPMAVER 


B 


GILLIGAN 


8 


FARSON 




FLEAK 


A 


FREOON 


c 


GARA 


B 


GILLS 


C 


FARUELL 




FLECHADO 


B 


FREDONIA 


c 


GARBER 


A 


GILLSBURG 


C 


FASKIN 




FLEER 


D 


FREDRICKSON 


c 


6ARBUTT 


B 


GIL1AN 


8 


FAT IN A 




FLEETWOOO 




FREEBURG 


c 


GARCENO 


C 


GILNORE 


C 


FATTIG 




FLEISCHMANN 





FREECE 





GARDE LL A 


D 


GILPIN 


C 


FAUNCE 




FLEMING 


C 


FREEDOM 


c 


GARDEN* 


B 


GILROY 


c 


FAUQUIER 




FLETCHER 


8 


FREEHOLD 


8 


GAROINER 


A 


GILSON 


8 


FAUSSE 




FLOKE 


D 


FREEL 


8 


GARDNER'S FORK 


B 


GILT EDGE 


D 


FAMCETT 




FLON 


C 


FREEMAN 


C 


GARDNERVILLE 


D 


GINAT 





FAWN 




FLOMATION 


A 


FREEHANVILLE 


8 


GAR DONE 


A 


GINGER 


C 


FAXON 




FLOHOT 


a 


FREEON 


8 


GAREV 


C 


GINI 


8 


FATAL 




FLORENCE 


c 


FREER 


C 


GARFIELD 


C 


GINSER 


C 


FATETTE 




FLORE SVILLE 


c 


FREESTONE 


C 


GARITA 


c 


GIRARDOT 





FAVETTEV1LLE 




FLORIDANA 


a/D 


FREEZE NER 


C 


GARLANO 


B 


GIRO 


A 


FAVHOOD 




FLORISSANT 


c 


FREMONT 


c 


GARLET 


A 


GIVEN 


C 


NOTES 


A 


BLANK HYOROLOGLC 


SOIL 


GROUP INDICATES 


THE SOIL GROUP HAS NOT 


BEEN 


DETERMINED 





TWO SOIL GROUPS SUCH AS B/C INDICATES THE ORAINED/UNORAINED SITUATION 

NEH Notice U-102, August 1972 



130 



Table A3, (continued) 



GLADDEN 


A 


GOTHARD 


D 


GROWDEN 


B 


HAMBR IGHT 


D 


HASTINGS 


B 


GLADE PARK 


C 


GOTHIC 


C 


GROWLER 


6 


HAMBURG 


B 


HAT 


D 


GLADSTONE 


S 


GOTHO 


C 


GRUBBS 


D 


HAMBY 




HATBORO 





GLADWIN 


A 


GOULDING 


D 


GRULLA 


D 


HAM EL 




HATCH 




GLAHIS 


C 


GOVAN 


C 


GRUMMIT 


D 


HAMERLY 




HATCHERY 




GLANN 


B/C 


GOVE 


B 


GRUNDY 


C 


HAMILTON 




HATFIELD 




GLASGOW 


C 


60WEN 


B 


GRUVER 


C 


HAMLET 




HATHAWAY 




GLEAN 


B 


GRABE 


B 


GRVGLA 


C 


HAMLIN 




HATTIE 




GLEASON 


C 


GRABLE 


B 


GUADALUPE 


B 


HAMMONTON 




HATTON 




GLEN 


8 


GRACEMONT 


B 


6UAJE 


A 


HAMPDEN 




HAUBSTADT 




GLENBAR 


B 


GRACE VI LLE 


B 


GUALALA 


D 


HAMPSHIRE 




HAUGAN 




GLENBERG 


B 


GRADY 





GUAMANI 


B 


HAMPTON 




HAUSER 




GLENBROOK 





GRAFEN 


B 


GUANABANO 


8 


HAHTAH 




HAVANA 




GLENCOE 


D 


GRAFTON 


B 


GUANAJIBO 


C 


NANA 




HAVEN 




GLENDALE 


B 


GRAHAM 


D 


GUANICA 





HANALEI 




HAVERLY 




GL ENDIVE 


B 


GRAIL 


C 


GUAYABO 


6 


HANAMAULU 




HAVERSON 




GLENDORA 


D 


GRAMM 


B 


SUA TAB OTA 





HANCEVILLE 


B 


HAVILLAH 




GLENELG 


B 


GRANATH 


8 


GUAYAMA 





HANCO 


D 


HAVINSDON 




GL ENFIELD 


D 


GRANBV 


A/D 


GUBEN 


8 


HAND 


B 


HAVRE 




GLENFORO 


C 


GRANDE RONDE 


D 


GUCKEEN 


C 


HANDRAN 


C 


HAVRELON 




GLENHALL 


B 


GRANDFIELO 


B 


GUELPH 


6 


HANDS BORO 


D 


HAW 




CLENHAH 


B 


GRAND VIEW 


C 


GUENOC 


C 


HANDY 




HAWES 




GLENMORA 


C 


GRANER 


C 


GUERNSEY 


c 


HANEY 




HAW I 




GLENNALLEN 


C 


6RANGER 


C 


GUERRERO 


c 


HANFORD 




HAMKEYE 




GiENOHA 


B 


GRANGE VI LLE 


B/C 


GUEST 





HANGAARD 




HAWKSELL 




GLEN ROSE 


B 


GRANILE 


B 


GUIN 


A 


HANGER 




HAWKSPRINGS 




GLENSTED 





GRANO 


D 


GULER 


B 


HANIPOE 




HAXTUN 




GLENTON 


B 


GRANT 


B 


GULKANA 


B 


HANKINS 




HAVBOURNE 




GLENVIEM 


B 


GRANT SBURG 


C 


GUMBOOT 


C 


HANKS 




HAV8RO 




6LENVILLE 


C 


GRANTSOALE 


A 


GUNBARREL 


A 


HANLV 




HAVDEN 




GLIDE 


B 


GRANVILLE 


B 


GUNN 


8 


HANNA 




HAYESTON 




GLIKON 


B 


GRAPEVINE 


C 


GUNNUK 


C 


HANNUN 




HA YE SV I LLE 




GLORIA 


C 


GRA SMERE 


B 


GUNSIGHT 


8 


HANOVER 




HAYFIELD 




GLOUCESTER 


A 


GRASSNA 


B 


GUNTER 


A 


HANS 




HAVFORD 




GLOVER 


C/D 


GRASS-V BUTTE 


A 


GURABO 





HANSEL 




HAYMOND 




GLVNDON 


B 


GRATZ 


C 


GURNEV 


C 


HANSKA 




HAVNESS 




GLYNN 


C 


GRAVDEN 


C 


GUSTAVUS 


D 


HANSON 




HAYNIE 




GJBLE 


c 


GRAVE 


B 


GUST IN 


C 


HANTHO 




HAVPRESS 




GODDARD 


B 


GRAVITY 


C 


GUTHRI E 





HANTZ 




HAY SPUR 


B/D 


60DDE 


D 


GRAYCALM 


A 


GUY TON 





HAP 




HAYTER 




GJOECKE 


D 


GRAYFORD 


8 


GWIN 





HAPGOOD 




HAYTI 




GODFREY 


c 


GRAYLING 


A 


GWINNETT 




HAPNEY 




HAYWOOD 




GODWIN 





GRAYLOCK 


B 


GYNER 




HARBORD 




HAZEL 




COEGLEIN 


c 


GRAYPOINT 


B 


GYPSTRUH 




HARBOURTON 




HAZELAIR 




GOESSEL 


D 


GRAYS 


B 






HARCO 




HAZEN 




60FF 


c 


GREAT BEND 


B 


HACCKE 




HARDEMAN 




HAZLEHURST 




GOGEBIC 


B 


GREELEY 


B 


HACIENDA 




HARDESTV 




HAZLETON 




60LBIN 


c 


GREEN BLUFF 


B 


HACK 




HARDING 




HAZTON 




GOLCONOA 





GREENBRAE 


C 


HACKERS 




HARDSCRABBLE 




HEAOLEY 




GOLD CREEK 


D 


GREEK CANYON 


B 


HACKETTSTOWN 




HAROY 




HEADQUARTERS 




GOLDfcNDALE 


B 


GREENCREEK 


B 


HADAR 




HARGREAVE 




HEAKE 




60LOFIELD 


B 


GREENDALE 


B 


HADES 




MARKERS 




HEATH 




GOLDHILL 


B 


GREENFIELD 


B 


HADLEY 




HARKEY 




HEATLV 




GOLDMAN 


C 


GREENHORN 


D 


HAOO 




HARLAN 




HEBBRONVILLE 




GOLDRIOGE 


B 


GREENLEAF 


8 


HAGEN 




HARLEM 




HEBER 




SOLDRUN 


A 


GREENOUGH 


C 


HAGENBARTH 




HARLESTON 




HEBERT 




GOLDS BORO 


c 


GREENPORT 




HAGENER 




HARLINGEN 




HEBGEN 




GOLDSTON 


C 


GREEN RIVER 


8 


HAGER 




HARMEHL 




HEBO 




COLDSTREAM 





GREENSBORO 




HA GERMAN 




HARMONY 




HEBRON 




GOLDVALb 


c 


GREENSON 


C 


HAGERSTOWN 




HARNEY 




HECHT 




GOLD VEIN 


c 


GREEN TON 


c 


HAGGA 




HARPER 




HECKI 




GOLIAD 


c 


GREENVILLE 


8 


HAGGERTV 




HARPETH 




HECLA 




GOLLAHER 


A 


GREENWATER 


A 


HAGSTAOT 




HARPS 




HECTOR 




GOLTRY 


A 


GREENWICH 


8 


HAGUE 




HARPSTER 




HEDDEN 




GOMEZ 


B 


GREENWOOD 





HAIG 




HARPT 




HEDRICK 




eONN 





CREER 


c 


HAIKU 




HAROUA 




HEDVILLE 




GONVICK 


B 


GREGORY 


A 


HAILNAN 




HARRIET 




HECNE 




GOOCH 





GREHALEM 


B 


HAINES 


B/C 


HARRIMAN 




HEIDEN 




GOOOALE 


C 


GRELL 





HAIRE 




HARRIS 




HEIOTNAN 




GOODING 


c 


GRENAOA 


C 


HALAWA 




HARRISBURG 




HEIL 




GOODINGTON 


c 


GRENVILLE 


B 


HALDER 




HARRISON 




HEIMDAL 




GOODLOW 


B 


GRESHAM 


C 


HALE 




HARRISVILLE 




MEISETON 




GOODMAN 


B 


GREWINGK 


D 


HALEDON 




HARSTENE 




HEISLER 




GOODRICH 


B 


GREVBACK 


B 


HALEIWA 




HARST INE 




HEIST 




GOOD SPRINGS 


D 


GRtVBULL 


C 


HALEY 




HART 




HE ITT 




GOOSE CKtEK 


B 


GREYCLIFF 


C 


HALF MOON 




HART CAMP 




MEITZ 




GOOSE LAKE 


D 


GREYS 


B 


HALFORO 




HARTFORD 




HEIZER 




GOOSMUS 


B 


GRIFFY 


B 


HALFWAY 




HART I G 




HELOT 




GORDO 


B 


GRIGSTON 


8 


HALGAITOH 




HARTLAND 




HELENA NO 




GORDON 


D 


GRIMSTAD 


8 


HAL 1 1 




HARTL ETON 




HELENA 




GORE 





GRI SWOLD 


8 


HALIIMAILE 




HART LINE 




HELHER 




GOkGONIO 


A 


GRITNEY 


C 


HALIS 




HARTSBURG 




HELVETIA 




GORMAN 


B 


GRIVER 


C 


HALL 




HARTSELLS 




HELV 




GORIN 


C 


GRIZZLY 


C 


HALLECK 




HARTSHORN 




HENBRE 




GORING 


C 


GROGAN 


8 


HALL RANCH 




HARVARD 




HEMNI 




GORMAN 


B 


6R0SECL0SE 


c 


HALLVILLE 




HARVEL 




HEMPFIELD 




60RUS 


A 


GROSS 


c 


HALSEY 




HARVEY 




HEMPSTEAD 




GORZfcLL 


B 


GROTON 


A 


HAM ACER 




HARWOOD 




HENCRATT 




GOSHEN 


B 


GROVE 


A 


HAMAKUAPOK3 




HASKI 




HENDERSON 




GOSHUTE 





GROVELAND 


B 


HA MAN 




MASK ILL 




HENDRICKS 




GOSPORT 


C 


GROVER 


8 


HA MAR 




HASKINS 




HENEFER 




GOTHAM 


A 


GROVE TON 


8 


HAMBLEN 




HASSELL 




HENKIN 




NOTES 


A 


BLANK HYDROLOGIC 


SOIL 


GROUP INDICATES 


THE SOIL GROUP HAS NOT 


BEE* 


DETERMINED 




TWO SOIL GROUPS SUCH AS 


B/C 


INDICATES THE DRAINED/UNDRAINED SITUATION 







NEH Notice U-102, August 1972 



131 



Table A3, (continued) 



HENLEY 


C 


HOBOG 


D 


HORD 


8 


HYAT 


A 


IIACORA 




HENLINE 


c 


H08 SON 


C 


HOREB 


B 


HVATTVILLE 


C 


IZEE 




HENNEKE 





HOCHHEIM 


B 


HORNE 





HYOABURG 









HENNEPIN 


8 


HOCKING 


B 


HORNELL 





HYOE 





JABU 




HENNINGSEN 


C 


HOCKINSON 


C 


HORNING 


A 


HYDRO 


c 


JACACUAS 




HENRY 





HOCKLEY 


C 


HORNITOS 





HYMAS 


D 


JACANA 




HENSEL 


B 


HODGE 


B 


HORROCKS 


8 


HYRUH 


8 


JACINTO 




HENSHAH 


C 


HODGINS 


C 


HORSESHOE 


8 


HYSHAH 


D 


JACK CREEK 




HENSLEY 


D 


HODGSON 


C 


HORTON 


8 






JACKLIN 




KEPLER 





HOE BE 


8 


HORTONVILLE 


8 


IAO 


C 


JACKNIFE 




HERBERT 


B 


HOELZLE 


C 


HOSKIN 


C 


I9ERIA 





JACKPORT 




HEREFORD 


B 


HOFFMAN 


C 


HOSKINNINI 


D 


ICENE 


c 


JACKS 




HERKIMER 


B 


HOFFHANVILLE 


c 


HOSLEY 





IDA 


8 


JACKSON 




HERLONG 





HOGANSBURG 


8 


HOSIER 


c 


10A9EL 


8 


JACKSONVILLE 




HERMISTON 


B 


HOG ELAND 


B 


HOTAN 


C 


I DAK 


B 


JACOB 




HERMON 


A 


HOGG 


c 


HOT LAKE 


c 


I DAN A 


C 


JACOBSEN 




HERNOON 


8 


HOGRIS 


8 


HOUDEK 


8 


IOEON 


D 


JACOB V 




HERO 


B 


HOH 


B 


HOUGHTON 


A/O 


IOMON 


8 


JACOUE S 




HERRERA 


A 


HOHMANN 


c 


HOUK 


C 


IGNACIO 


C 


JACQUITH 




HERRI CK 


C 


HOKO 


c 


HOULKA 





I GO 


D 


JACWIN 




HERRON 


8 


HOL BROOK 


8 


HOULTON 


C/O 


IGUALOAD 





JAFFREY 




HERSH 


A 


HOLCOMB 





HOUNDBY 





IHLEN 





JA6UEVES 




HERSHAL 


B/D 


HOLDAMAY 


D 


HOURGLASS 


• 


UAH 





JAL 




HESCH 


B 


HOLDEN 


A 


HOUSATONIC 





ILOEFONSO 


8 


JALNAR 




HESPER 


C 


HOLDER 


8 


HOUSE MOUNTAIN 





ILKA 


8 


JANES CANYON 


B/C 


HESPERIA 


B 


HOLDERNAN 


c 


HOUSEVILLE 


c 


ILL I ON 


B/D 


JAMESTOWN 




HESPERUS 


8 


HOLDERNESS 


c 


HOUSTON 





IMA 


8 


JANE 




HESSE 


C 


HOLDREGE 


8 


HOUSTON BLACK 





INBLER 


B 


JANISE 




HESSEL 





HOLLAND 


B 


HOVDE 


A/C 


INLAY 


C 


JANSEN 




HESSELBERG 





HOL LINGER 


B 


HOVEN 





IHMOKALEE 


B/O 


JARAB 




HESSELTINE 


8 


HOLLIS 


C/D 


HOVENWEEP 


c 


IMPERIAL 





JAR80E 




HESSLAN 


C 


HOL LISTER 





HOVERT 





INAVALE 


A 


JARITA 




HESSON 


C 


HOLLONAN 


C 


HOVEY 


c 


INDART 


B 


JARRE 




HETTINGER 





HOLLOWAY 


A 


HOWARD 


a 


INOIAHOMA 





JAR VIS 




HEXT 


B 


HOLLY 





HOWELL 


c 


INDIAN 




JASPER 




HEZEL 


B 


HOLLY SPRINGS 





HOW LAND 


c 


INDIAN CREEK 


D 


JAUCAS 




HIALEAH 





HOLLYWOOD 


D 


HOYE 


8 


INDIANO 


C 


JAVA 




HIAWATHA 


A 


HOLHDEL 


C 


HOY LET ON 


C 


INOIANOLA 


A 


JAY 




HIB6AR0 





HOLMES 


B 


HOY PUS 


A 


INDIO 


B 


JAYEN 




HIB6ING 


c 


HOLOMUA 


B 


HOYTVILLE 





INGA 


B 


JAVSON 




HIBERNIA 


c 


HOLOPAW 


B/O 


HUBBARD 


A 


INGALLS 


B 


JEAN 




HICKORY 


c 


HOLROYD 


6 


HUBERLY 





INGARD 


B 


JEANERETTE 




HICKS 


B 


HOL SINE 


B 


HUBERT 


8 


INGENIO 


C 


JEAN LAKE 




HIDALGO 


8 


HOL ST 


B 


HUBLERSBURG 


C 


INGRAM 





JEDO 




HIDEAWAY 





HOLSTON 


8 


HUCKLEBERRY 


C 


INKLER 


8 


JEBBO 




HIOEHOOD 


C 


HOLT 


8 


HUDSON 


C 


INKS 


D 


JEFFERSON 




HIERRO 


c 


HOLTLE 


8 


HUECO 


C 


INMACHUK 


D 


JEKLEY 




HIGHAHS 


S/ 


HOLTVILLE 


C 


HUEL 


A 


INHAN 


C 


JELN 




HIGHFIELD 


HOL YOKE 


C/O 


HUENEME 


B/C 


INHO 


A 


JENA 




HIGH GAP 


c 


HOMA 


C 


HUERHUERO 





INNESVALE 





JENKINS 




HIGHLANO 


B 


HOME CAMP 


c 


HUEY 


D 


INSKIP 


C 


JENKINSON 




HIGHHORE 


B 


HOME LAKE 


B 


HUFFINE 


A 


INVERNESS 





JENNESS 




HIGH PARK 


B 


HOMER 


C 


HUGGINS 


C 


INVILLE 


B 


JENNINGS 




HIHIMANU 


A 


HOME STAKE 


D 


HUGHES 


8 


INWOOO 


C 


JENNY 




HIIBNER 


C 


HOMESTEAD 


B 


HUGHESVILLE 


8 


10 


8 


JERAULD 




HIKO PEAK 


B 


HONAUNAU 


C 


HUGO 


8 


I OLA 


1 


JERICHO 




HIKO SPRINGS 





HONCUT 


8 


HUICHICA 


C/O 


IOLEAU 


C 


JEROME 




HILDRETH 





HONOALE 





HUIKAU 


A 


I ON A 


8 


JERRY 




HILEA 





HONDO 


C 


HULETT 


8 


IONIA 


B 


JESBEL 




HILES 


B 


HONDOHO 


8 


HULLS 


C 


IOSCO 


B 


JESSE CANP 




HILGER 


8 


HONEOYE 


8 


HULLT 


8 


IPAVA 


8 


JESSUP 




HILGRAVE 


8 


HONEY 





HULUA 





IRA 


C 


JCTT 




HILLEHANN 


c 


HONEYGROYE 


c 


HUM 


8 


IREDELL 





JIMS 




HILLERY 





HONEVVILLE 


C 


HU MACAO 


8 


IRETEBA 


C 


JIN 




HILLET 





HONN 


8 


HUMATAS 


C 


I RIM 


c 


JIMENEZ 




HILLFIELD 


• 


HONOKAA 


A 


HUHBAAGER 


8 


IROCK 


B 


JINTOMN 




H1LLCATE 


D 


HONOLUA 


8 


HUMBIRD 


C 


IKON BLOSSOM 





JOB 




MILLIARD 


■ 


HONOHANU 


8 


HUMBOLDT 


D 


IRON MOUNTAIN 





JOBOS 




HILLON 


8 


HONOULIULI 





HUHOUN 


8 


IRON RIVER 


1 


JOCITV 




HlLLSBORO 


8 


HONUAULU 


A 


HUME 


C 


1 RONTON 


c 


JOCKO 




HILLSDALE 


8 


HOOO 


8 


HUME ST ON 


C 


IRRICON 


c 


JOOERO 




HILHAR 


C/O 


HOOOLE 


8 


HUMMINGTON 


C 


IRVINGTON 


c 


JOEL 




HILO 


A 


HOOO SPORT 


C 


HUMPHREYS 


.8 


IRWIN 


D 


JOES 




HILT 


8 


HOOOVIEW 


8 


HUNPTULIPS 


8 


ISAAC 


c 


JOHNS 




HILTON 


8 


HOOKTON 


C 


HUNSAKER 


B/C 


ISAAOUAH 


B/C 


JOHNSBURG 




HINCKLEY 


A 


HOOLEHUA 


B 


HUNTERS 


8 


I SAN 





JOHNSON 




HINDES 


c 


HOOPAL 





HUNTING 


C 


ISANTI 





JOHNSTON 


8/D 


HINESBURG 


C 


HOOPER 





HUNTINGTON 


8 


IS8ELL 


c 


JONNSMOOD 




HINKLt 





HOOPESTON 


B 


HUNTSVILLE 


8 


ISHAM 


c 


JOICE 




HINHAN 


c 


HOOSIC 


A 


HUPP 


8 


ISHI PISHI 


c 


JOLAN 




HINSDALE 




HOOT 


D 


HURDS 


8 


ISLAND 


B 


JOLIET 




HINTZE 


D 


HOOTEN 





HURLEY 





I SON 


B 


JONESVILLE 




HIPPLE 


C 


HOOVER 


B 


HURON 


C 


ISSAOUAH 


B/C 


JONUS 




HISLE 





HOPEKA 


D 


HURST 





IST0KPO6A 


D 


JOPLIN 




HITT 


B 


HOPE TON 


C 


HURWAL 


8 


ITCA 


D 


JOPPA 




HI VISTA 


C 


HOPEWELL 




HUSE 


C 


ITSWOOT 


B 


JORDAN 




H1NASSEE 


8 


HOPGOOD 


C 


HUSSA 


B/D 


IUKA 


c 


JORGE 




HI MOOD 


A 


HOPKINS 


B 


HUSSMAN 





IVA 


c 


JOKNAOA 




HIXTJN 


B 


HOPLEY 


B 


HUTCHINSON 


C 


IVAN 


B 


JORV 




HO BACK EX 


B 


HOPPER 


B 


HUT SON 


8 


IVES 


B 


JOSE 




HO BAN 


C 


HOQUIAM 


8 


HUXLEY 





IVIE 


A 


JOSEPHINE 




HOBBS 


B 


HORATIO 


D 


HYAM 





IVINS 


c 


JOSIE 




MOTES 


BLANK HYDROLOG1C 


SOIL 


GROUP INDICATES 


THE SOIL GROUP HAS NOT 


BEEN 


DETERMINED 






TWO SOIL GROUPS SUCH AS 


B/C INDICATES THE DRAINED/UNDRAINEO SITUATION 







NEH Notice U-102, August 1972 



132 



Table A3, (continued). 



JOV 1 


1 RARNAR 





RE OWNS 





RIPP 


C 


KOVICH 


D 


JUAN A 01 A Z 1 


1 RARNES 


B 


REPLER 


C 


RIPPEN 


A 


KOYEN 


B 


jinnee ( 


RARRO 


6 


RERBV 


B 


KIPSON 


C 


KOYUKUK 


B 


JUOD ( 


) RARS 


A 


KERNEL 


B 


KIRK 


B/D 


KRADE 


B 


JUDITH 1 


t RARSHNER 





RERNIT 


A 


KIRKHAH 


C 


KRANZBURG 


B 


JUOKINS ( 


RARTA 


C 


RERNO 


A 


KIRKLAND 


D 


KRATKA 


C 


JUOSON 1 


t RARTAR 


B 


KERR 


B 


KIRKTON 


B 


KRAUSE 


A 


JUOV ( 


RASCHHIT 





RERRICR 


B 


KIRKVILLE 


C 


KREANER 


C 


JUGET ( 


» KASHWITNA 


B 


RERRTOMN 




KIRTLEY 


C 


KREMLIN 


B 


JL'GHANOLE f 


1 RASILOF 


A 


KERSHAW 


A 


RIRVIN 


C 


KRENTZ 


C 


JULES 1 


) KASRI 


B 


KERSICR 





RISRING 


D 


KRESSON 


C 


JULESBURG i 


i RASOTA 


C 


RERSTON 


A/0 


KISSICK 


D 


KRUN 


D 


JUL1AETTA i 


'. RASSLER 


A 


RERT 


C 


KISTLER 


C/D 


KRUSE 


B 


JUMPE 1 


1 RASSON 


C 


KERHIN 


c 


RITCHELL 


B 


KRUZOF 


B 


JUNCAL ( 


RATAHA 


6 


RESSLER 


c 


KITCHEN CREEK 


B 


KUBE 


B 


JUNCOS ( 


> RATEMCY 


C 


KESWICK 





KITSAP 


C 


KUBLER 


C 


JUNCTION 1 


1 RATO 


c 


RETCHLY 


B 


KITTANNING 




KUBLI 


c 


JUNEAU 1 


» RATRINE 


B 


RETTLE 


B 


KITTITAS 





KUCERA 


B 


JUNIATA 


RATULA 


B 


KETTLEHAN 


B 


KITTREDGE 


C 


KUCK 


C 


JUNIPERO ( 


1 RATV 


C 


KETTNER 


C 


R ITT SON 


C 


KUGRUG 


D 


JUNIUS ( 


RAUFNAN 





KEVIN 


c 


KIUP 


B 


KUHL 





JUNO 1 


1 RAUPO 


A 


KEWAUNEE 


c 


KIVA 


B 


KUKAIAU 


A 


JUNQUITOS < 


RAVETT 





REHEENAU 


A 


RIWANIS 


A 


KULA 


B 


JURA ( 


RANAIHAE 


c 


KEY* 


B 


KIZHUVAK 


B 


KULAKALA 


B/C 


JUVA 1 


> KAWAIHAPAI 


B 


REYES 


D 


KJAR 


D 


KULLIT 


B 


JUVAN [ 


> RAHBAMCAH 


C 


REYNER 


D 


KLABER 


C 


KUNA 


B 




RAMICH 


A 


REVPORT 


C 


KLAMATH 


B/D 


KUNIA 


B 


KAALUALU I 


i KAWKAWLIN 


C 


REVSTONE 


A 


KLAUS 


A 


KUNUWEIA 


C 


KACHEHAK 1 


> REAAU 





KEVTESVILLE 





KLAMASI 





KUPREANOF 


B 


MOAKE C 


) REAHUA 


8 


KEZAR 


8 


KLEJ 


B 


KUREB 


A 


MOASHAN 1 


l REALARERUA 


C 


KIAHAH 


C 


KLICKER 


C 


KURO 


D 


RAGE ( 


REALIA 





KIBBIE 


8 


KLICKITAT 


C 


KUSKOKWIM 


D 


MO IN 1 


1 REANSBURC 





KICRERVILLE 


8 


KLINE 


B 


KUSLINA 


D 


RAOORA 1 


I REARMS 


B 


RIOD 


D 


KLINESVILLE 


C/D 


KUTCH 





KAENA ( 


) REATING 


C 


KIDMAN 


B 


KLINGER 


B 


KUTZTOWN 


B 


KAHALUU I 


» REAURAHA 





KIEHL 


A 


KLONDIKE 


D 


KVICHAK 


B 


RAMAN* 1 


l REAHAKAPU 


B 


MET IKE 


D 


KLONE 


B 


KWETHLUK 


A 


RAHANUI i 


1 KE6LER 


B 


KIEV 


B 


KLOOCHMAN 


C 


KYLE 





RAHLER f 


1 RECH 





KIRONI 


B 


KLOTEN 


B 


KVLER 





RAHOLA 1 


1 RECRO 


B 


RILARC 


D 


KLUTINA 


B 






RAH SHEETS ( 


> REORON 


C 


RILAUEA 


B 


KNAP PA 


B 


LA BARGE 


B 


RAHUA I 


> REEFERS 


C 


KILBOURNE 


A 


KMEELAND 


C 


LABETTE 


C 


KAIRLI ( 


> REECAN 




RILBURN 


B 


KNIFFIN 


C 


LABISH 





RAILUA t 


i REE I 





RILCHIS 


D 


KNIGHT 


C 


LABOU 


D 


RA1NU 1 


k REEREE 


B 


RILOOR 


C 


KNIK 


B 


LABOUNTY 


C 


RAINALIU i 


I REELOAR 


B 


KILGORE 


B/D 


KNIPPA 


D 


LA BOUNTY 


C 


RA1P0I0I 1 


1 REENE 


C 


KILKENNY 


B 


KNOB HILL 


B 


LA BRIER 


c 


RAIMIRI i 


\ REE NO 


c 


RILLBUCR 


C/0 


KNOWLES 


B 


LAB SHAFT 





RALAE 1 


1 REESE 





RILLEY 


D 


KNOX 


B 


LACANAS 


C/D 


KALALOCH I 


1 REG 


B 


RILLINGMORTH 




KNULL 


C 


LA CASA 


C 


KALAHA ( 


REHENA 


c 


KILLPACR 


C 


KNUTSEN 


B 


LACITA 


B 


KALAMAZOO 1 


1 KE ISLET 


C 


KILHERQUE 


c 


KOBAR 


C 


LACKAWANNA 


C 


KALAPA 1 


1 REISER 


B 


KILN 





KOBEH 


8 


LACUNA 


C 


KALAUPAPA ( 


) RE1TH 


B 


KILOA 


A 


KOCH 


c 


LACOTA 





KALIFONSKY ( 


) RERAHA 


6 


R1L0HANA 


A 


KODAK 


C 


LACY 





RALIHI 1 


) RERARE 





KILWINNING 


C 


KODIAK 


B 


LADO 


B 


KALI SPELL 1 


I RELLER 


c 


RIN 


B 


ROEHLER 


C 


LADDER 


D 


KALKASKA t 


I RELLV 





KINANA 


B 


ROELE 


1 


LADELLE 


8 


KALHIA 1 


1 RELN 


c 


KIMBALL 


C 


ROEPKE 


t 


LADOGA 


C 


RALORO ( 


> KELSEY 





KINBERLY 


B 


KOERL ING 


B 


LADUE 


8 


KALOLOCH 1 


1 KELSO 


c 


RIHBROUGH 


D 


KOGISH 


D 


LAOYSMITH 





RALSIN < 


> RELTNER 


B 


KIHHERLING 





KOHALA 


A 


LA FARGE 


8 


KAMACK 1 


\ KELVIN 


c 


KIHMONS 


C 


KOKEE 


B 


LAFE 





RANAROA / 


k REHHERER 


c 


KINO 


c 


KOKERNOT 


C 


LAFITTE 





RANAOA 1 


1 RENOO 


e 


KINA 





KOKO 


B 


LA FONDA 


8 


RAN AOL E 1 


i KEMPS VI LLE 


B 


RINCO 


A 


KOKOKAHI 


D 


LAFONT 


8 


RANAY S 


> RENPTON 


B 


KIHESAVA 


C 


KOKOHO 


B/D 


LAGLORIA 


8 


RAMIE i 


) RENAI 


c 


KINGFISHER 


B 


KOLBERG 


B 


LAGONDA 


C 


RANRAR f 


1 RENANSVILLE 


A 


K1NGHURST 


6 


KOLEKOLE 


C 


LA GRANDE 


c 


KANABEC 1 


1 KcNOAIA 


c 


RING HAN 


D 


ROLLS 


D 


LAGRANGE 





RANARA 1 


I RENOALL 


B 


RINGS 


C/D 


KOLLUTUK 


D 


LAHAINA 


B 


RANAPAHA { 


k/0 KENOALLVILLE 


B 


KINGSBURY 





KOLOA 


C 


LA HOGUE 


8 


RANOIR 1 


1 RENESAM 


B 


RINGSLEV 


e 


ROLOB 


c 


LAHONTAN 





RANE 1 


1 KENNOOR 


B 


KINGS RIVER 


c 


KOLOKOLO 


& 


LAHRITY 


A 


RANEOHE 1 


> KENNALLV 


B 


KINGSTON 


B 


KONA 





LAIDIG 


C 


RANEPUU 1 


l RENNAN 


B 


RINCSVILLE 


C 


KONAWA 


B 


LAIOLAW 


a 


RANIMA ( 


RENNEBEC 


B 


KINKEAO 


c 


KONNER 


D 


LAIL 


c 


KANLEE 1 


t RENNEOY 


B/C 


KINKEL 


B 


KONOKTI 


C 


LAIROSVILLE 





RANOSH « 


i RENNER 





KINKORA 


D 


ROOLAU 


C 


iAIREP 





KANZA 1 


> KENNEWICK 


B 


RINNAN 


C 


K00SK1A 


c 


LAJARA 





RAPAA 1 


k RENNEV 


A 


KINNEAR 


B 


KOOTENAI 


A 


LAKE 


A 


RAPAPALA < 


1 RENNEY LAKE 


C 


KINNEY 


B 


KOPIAH 


D 


LAKE CHARLES 


D 


RAPOO 1 


1 RENO 





KINNICK 


C 


KOPP 


B 


LAKE CREEK 


C 


RAPOHSIN ( 


; RE NONA 





KINREAO 





KOPPES 


B 


LAKEHELEN 


B 


RAPUHIRANI 1 


) RENSAL 


B 


KINROSS 





KORCHEA 


6 


LAKEHURST 


A 


KAAAHIN 1 


1 RENSPUR 


A 


KINSTON 





KORNMAN 


8 


LAKE JANEE 


8 


RAROE i 


1 RENT 





KINTA 





KOSMOS 


D 


LAKELAND 


A 


RARHEEN 1 


i REN VON 


C 


KINTON 


c 


ROSSE 


D 


LAKE MONT 


D 


RAMAN 1 


: REO 


B 


RINZEL 


8 


KUSTER 


C 


LAKEPORT 


B 


RARLIN 1 


k KEOLDAR 


8 


KIONATIA 


A 


KOSZTA 


8 


LAKESHORE 





RAALO 1 


) REONAH 


C 


RIONA 


B 


KOTEDO 





LAKE SOL 


B 


RARLUK 1 


) REOTA 


C 


KIPLING 


D 


KOUTS 


B 


LAKE TON 


B 


NOTES 


A BLANK HVOROL06IC 


SOIL 


GROUP INDICATES 


THE SOIL GROUP HAS NOT 


BEEN 


DETERMINED 




TWO 


SOIL CROUPS SUCH AS 


B/C 


INDICATES THE 0RA1NED/UNDRA1NED SITUATION 







NEH Notice U-102, August 1972 



133 



Table A3, (continued) 



LAKEVIEH 


C 


LATAH 


C 


LENAMEE 


8/0 


LINVILLE 


B 


LORADALE 


C 


LAKEH1N 


B 


LATAHCO 


C 


LENNEP 


D 


L1NW0O0 


A/D 


LORAIN 


C/D 


LAKEWOOD 


A 


LATANG 


B 


LENOIR 





LIPAN 


D 


LORDSTOWN 


C 


LAKI 


B 


LATANIER 


D 


LENOX 


8 


LIPPINCOTT 


B/D 


LOREAUVILLE 


C 


LAKIN 


A 


LATENE 


B 


LENZ 


e 


LIRIOS 


B 


LORELLA 


D 


LAKOMA 


D 


LATHAM 





LEO 


8 


LIRRET 


D 


LORENZO 


A 


LALAAU 


A 


LATHROP 


C 


LEON 


I/O 


LISADE 


B 


LORETTO 


8 


LA LANOE 


6 


LATINA 





LEONARD 


C 


LLSAM 


D 


LORING 


C 


L ALL IE 





LATOM 


D 


LEONARDO 


8 


LISBON 


8 


LOS tLANOS 


8 


LAN 


B/D 


LATONIA 


B 


LEONARDTOMN 





LISMAS 


D 


LOS BANOS 


C 


LAMAR 


B 


LATTY 


D 


LEONIDAS 


B 


LISMORE 


8 


LOSEE 


8 


LANARTlNfc 


B 


LAUDERDALE 


e 


LEOTA 


C 


LITCHFIELD 


A 


LOS GATOS 


B/C 


LAMBERT 


B 


LAUGENOUR 


B/D 


LEPLEY 


D 


LITHGOM 


C 


LOS GUINEOS 


C 


LAMBETH 


C 


LAUGHLIN 


B 


LERDAL 


C 


LITHIA 


C 


LOSHNAN 


D 


LANBORN 





LAUMAIA 


6 


LEROY 


8 


LITIMBER 


c 


LOS OSOS 


C 


LANINCTON 





LAUREL 


C 


LESAGE 


8 


LITLE 


c 


LOS ROBLES 


8 


LAMO 


B 


LAURELHURST 


C 


LESHARA 


B 


LITTLEBEAR 


A 


LOS TANOS 


8 


LAMONI 





LAURELMOOO 


B 


LESHO 


C 


LITTLEFIELD 


D 


LOST CREEK 


B 


LAMONT 


A 


LAUREN 


B 


LESLIE 


D 


LITTLE HORN 


C 


LOST HILLS 


C 


LAMONTA 





LAVALLEE 


B 


LESTER 


8 


LITTLE POLE 





LOS TRANCOS 





LAMOURE 


C 


LAVATE 


B 


LE SUEUR 


8 


LITTLETON 


B 


LOSTWELLS 


8 


LAMPHIER 


8 


LAVEEM 


B 


LETA 


C 


LITTLE WOOD 


B 


LOTHAIR 


C 


LAMPSHIRE 





LAVELOO 


D 


LETCHER 


D 


LITZ 


C 


LOTUS 


8 


LAM SON 





LAVERKIN 


C 


LETHA 


D 


LIV 


C 


LOUDON 


C 


LANARK 


B 


LA VERKIN 


C 


LETHENT 


C 


LIVERMORE 


A 


LOUOONVILLE 


C 


LANCASTER 


B 


LAVINA 


C 


LETORT 


B 


LIVIA 


D 


LOUIE 


c 


LANCE 


C 


LAMAI 


B 


LETTERBOX 


8 


LIVINGSTON 


D 


LOUISA 


B 


LANO 





LAWET 


C 


LEVAN 


A 


LIVONA 


A 


LOUISBURG 


8 


LANOES 


B 


LAWLER 


B 


LEVASY 


C 


LIZE 


C 


LOUP 





LANOISBURG 


C 


LAWRENCE 


C 


LEVERETT 


c 


LIZZANT 


B 


LOURDES 


C 


LANOLOH 


C 


LAHRENCEVILLE 


c 


LEVIATHAN 


8 


LLANOS 


C 


LOUVIERS 





LAN DUSKY 





LAMSHE 


c 


LEVIS 


C 


LOBDELL 


C 


LOVE JOY 


c 


LANE 


c 


LAHSON 


B 


LEWIS 





LOBELVILLE 


c 


LOVELAND 


c 


LANEV 


c 


LAWTHER 


D 


LEWISBERRY 


8 


LOBERG 


8 


LOVELL 


c 


LANG 


B/D 


LAWTON 


C 


LEWISBURG 


C 


L06ERT 


8 


LOVELOCK 


C/D 


LANGFORD 


C 


LAX 


C 


LEMISTON 


c 


LOBITOS 


C 


LOWELL 


C 


LANGHEI 


B 


LAXAL 


B 


LEWISVILLE 


C 


LOCANE 


D 


LOWRV 


8 


LANGLEY 


C 


LAYCOCK 


B 


LEX 


8 


LOCEY 


C 


LOWVILLE 


B 


L ANGLO IS 





LAY TON 


A 


LEXINGTON 


B 


LOCHSA 


8 


LOYAL 


8 


LANGOLA 


B 


LAZEAR 


D 


LHAZ 


B 


LOCKE 


8 


LOYAL TON 


D 


LANGRELL 


B 


LEA 


C 


LIBBINGS 


D 


L0CKER8V 


C 


LOYSVILLE 


D 


LANGSTON 


C 


LEADER 


B 


LIBBY 


8 


LOCK HARD 


8 


LOZANO 


8 


LANIER 


B 


LEADPOINT 


B 


LIBEG 


A 


LOCKHART 


8 


LOZIER 


D 


LAN1GER 


B 


LEADVALE 


C 


LIBERAL 


D 


LOCKPORT 


D 


LUALUALEI 





LANKBUSH 


B 


LEADVILLE 


B 


LIBERTY 


C 


LOCKWOOD 


8 


LUBBOCK 


C 


LANK IN 


C 


LEAF 





LIBORY 


A 


LOCUST 


C 


LUBRECHT 


c 


LANKTREE 


C 


LEAHY 


c 


LIBRARY 


D 


LODAR 


D 


LUCAS 


c 


LANOAK 


B 


LEAL 


B 


LIBUTTE 


D 


LODEMA 


A 


LUCE 


c 


LAN SO ALE 


B 


/LEAPS 


C 


UCK 


8 


LOCI 


C 


LUCEDALE 


8 


LANSDOMNE 


C 


LEATHAM 


c 


LICK CREEK 


D 


LODO 


D 


LUCERNE 


8 


LANSING 


B 


LEAVENWORTH 


8 


LICKDALE 


D 


LOFFTUS 


C 


LUCIEN 


C 


LANTIS 


B 


LEAVITT 


8 


LICKING 


C 


LOFTON 


D 


LUCILE 


D 


LANTON 


D 


LEAVMTVILLE 


8 


LICKSKILLET 





LOGAN 


D 


LUC I LE TON 


e 


LANTONIA 


B 


LEBANON 


C 


LIODELL 


D 


LOGOELL 


D 


LUCKENBACH 


C 


LANTZ 





LEBAR 


B 


LIEBERMAN 


C 


LOGGERT 




LUCKY 


8 


LAP 





LE BAR 


8 


LIEN 


D 


LOGHOUSE 




LUCKY STAR 


8 


LA PALMA 


C 


LEBEC 


B 


LIGGET 


B 


LOGY 




LUCY 


A 


LAPEER 


B 


LEBO 


C 


LIGHTNING 


D 


LOHLER 




LUOOEN 


D 


LAPINE 


A 


LEBSACK 


C 


LIGNUM 


C 


LOHMILLER 




LUDLOW 


C 


LAPLATTA 


c 


LECK KILL 


8 


LIGON 


D 


LOHNES 




LUEDERS 


C 


LAPON 





LEDBEDER 


B 


LI HEN 


A 


LOIRE 




LUFKIN 


D 


LAPORTE 


c 


LEDGEFORK 


A 


LIHUE 


8 


LOLAK 




LUHON 


8 


LA POST* 


A 


LEDGER 





LIKES 


A 


LOLAL ITA 




LUJANE 


C 


LA PKA1RIE 


B 


LEORU 





LILAH 


A 


LOLEKAA 




LUKIN 


C 


LARABEE 


B 


LEDY 




LILLIWAUP 


A 


LOLETA 


C/D 


LULA 


8 


LARAND 


B 


LEE 


D 


LIMA 


8 


LOLO 




LULING 


D 


LARCHMOUNT 


B 


LEEDS 


C 


LIMANI 


8 


LOLON 




LUNBEE 


D 


LAROELL 


C 


LEEFIELD 


C 


LIMBER 


8 


LOMA 




LUNNI 


B/C 


LAREOO 


B 


LEELANAU 


A 


LIMERICK 


C 


LOMALTA 




LUN 


C 


LARES 


C 


LEEPER 


D 


LIMON 


C 


LOMAX 




LUNA 


C 


L ARGENT 





LEESVILLE 


B/C 


LIMONES 


8 


LOMIRA 




LUNCH 


c 


LARGO 


B 


LEETON 


C 


LIMPIA 


C 


LOMITAS 




LUND I NO 


c 


LARIM 


A 


LEE TOM A 


c 


LINCO 


8 


LONDO 




LUNDY 





LARIMER 


B 


LEFOR 


8 


LINCOLN 


A 


LONE 




LUNT 


c 


LARK IN 


a 


LEGLER 


6 


LINCROFT 


A 


LONEP INE 




LUPPiNO 


c 


LARKSON 


C 


LEGORE 


B 


UNOLEY 


C 


LONER IDCE 




LUPTON 





LA ROSE 


B 


LEHEH 


C 


LINDSEY 


D 


LONE ROCK 




LURA 


D 


LARRY 





LEHIGH 


C 


LINOSIDE 


C 


LONETREE 




LURAV 


C/D 


LARSON 





LEHMANS 





LINDSTROM 


8 


LONGFORD 




LUTE 


D 


LARUE 


A 


LEHR 


8 


LINDY 


C 


LONGLOIS 




LUTM 


C 


L AAV IE 





LEICESTER 


C 


LINEVILLE 


c 


LONGNARE 




LUTHER 


• 


LAS 


C 


LEILEHUA 


8 


LINGANORE 


8 


LONGNONT 




LUTIE 


8 


LAS ANIMAS 


c 


LELA 


D 


LINKER 


8 


LONGRIE 




LUTON 





LASAUSES 


c 


LELAND 





LINKVILLE 


8 


LONGVAL 




LUVERNE 


C 


LAS FLORES 





LEMETA 





LINNE 


C 


LONG VALLEY 




LUXOR 





LASHLEY 




LEMING 


c 


LINNET 





LONGVIEW 




LUZENA 





LASIL 





LEMM 


8 


LINNEUS 


8 


LONOKE 




LVCAN 


8 


LAS LUCAS 


c 


LEMONEX 





LINO 


C 


LONTI 




LYCOMING 


C 


LAS POSAS 


c 


LEMPSTER 


C/D 


LINOYER 


8 


LOOKOUT 




LVDA 





LASSEN 





LEN 


C 


LINSLAW 


D 


LOON 




LVDICK 


• 


LASTANCE 


B 


LENA 


A 


LINT 


B 


LOPER 




LVFORD 


c 


LAS VEGAS 





LENAPAH 


D 


LINTON 


8 


LOPEZ 


D 


LVLES 


8 


NOTES 


A 


BLANK HYOROLOGLC 


SOIL 


CROUP INOICATES 


THE SOIL CROUP HAS NOT 


BEEN 


DETERMINED 




TMO SOIL GROUPS SUCH AS 


8/C INDICATES THE DRAINED/UNDRAINED SITUATI3N 







NEH Notice U-102, August 1972 



134 



Table A3, (continued). 



LYNAN 


C/0 


MALIN 


C/0 


MARLETTE 


8 


HAY DAY 


D 


MCPHERSON 


C 


LYNANSON 


C 


MALJAHAR 


8 


HARLEY 


C 


HAVER 


D 


MCPHIE 


B 


LYNCH 





MALLOT 


A 


MARLIN 


D 


HAYES 


D 


MCQUARRIE 


D 


LYNCHBURG 


B/D 


MALM 


C 


HARLOW 


C 


HATFIELD 


B 


MCQUEEN 


C 


LVNDEN 


A 


HALO 


B 


MARLTON 


C 


MAYFLOWER 


C 


HCRAE 


8 


LYNNDVL 


A 


MALONE 


B 


MARMARTH 


8 


MAYHEM 


D 


MCTAG5ART 


B 


LYNN HAVEN 


B/D 


MALOTERRE 





HARNA 


D 


MAYLAND 


C 


HCVICKERS 


C 


LYNNVILLE 


C 


HALPAIS 


C 


HARPA 


B 


MAVNEN 


D 


HEAD 


D 


LYNX 


B 


MALPOSA 


C 


MARPLEEN 





MAYNARO LAKE 


8 


HEAOIN 


A 


LVONNAN 


C 


MALVERN 


C 


MARQUETTE 


A 


MAYO 


8 


HEADOWVILLE 


8 


LYONS 


D 


HAMALA 


D 


MARR 


B 


MAVODAN 


B 


NEADVILLE 


C 


LYONS VILLE 


B 


HAMOU 


c 


MARRIOTT 


8 


MAYO WORTH 


C 


MEANDER 





LYSINE 





MANAHAA 


c 


HARSOEN 


C 


HAVSDORF 


B 


NECAN 


8 


LYSTAIR 


B 


MANALAPAN 




HARSELL 


8 


NAYSV ILLE 




MECCA 


B 


LYTELL 


B 


HANANA 


c 


MARSHALL 


8 


MAYTOMN 


C 


HECKESVILLE 


C 






HANASSA 


c 


NARSHAN 





HAW ILLE 


B 


MECKLENBURG 


C 


HA BANK 


D 


HANASSAS 


B 


HARSHDALE 


C 


HAYWOOO 


B 


MEDA 


B 


NABEN 


C 


HANASTASH 


C 


MARSHFIELD 


c 


HAZEPPA 


B 


HEDANO 


C 


NABI 





HANATBE 


B/D 


HARSING 


8 


HAZON 


C 


MEOARY 


C 


NABRAV 


D 


HANANA 


C 


MART 


C 


HAZUHA 


C 


NEDFORO 


8 


MACAU 


B 


MANCELONA 


A 


MARTELLA 


B 


MCAFEE 


c 


HEOFRA 


II 


MACEDONIA 


C 


MANCHESTER 


A 


MARTIN 


C 


HCALLEN 


» 


MEDICINE LODGE 


8 


MACFARLANE 


B 


MANDAN 


8 


MARTINA 


A 


MCALLISTER 


c 


HEOINA 


B 


MACHETE 


C 


HANDERFIELO 


8 


MART I NECK 


D 


MCALPIN 


c 


HEDLEY 


B 


MACHIAS 


B 


HANDEVILLE 


8 


MARTINEZ 





MCBEE 


B 


HEDMAV 


8 


NACHUELO 


D 


HANFREO 


D 


MARTINI 


B 


MCBETH 


D 


HEEKS 


A 


HACK 


C 


HAN GUM 


D 


HARTINSBURG 


8 


MCBRIDE 


B 


MEETEETSE 


D 


NACKEN 


D 


MANHATTAN 


A 


HARTINSOALE 


B 


HCCABE 


B 


HEGGETT 





MACKINAC 


8 


HANHE-IH 


C 


MARTINSON 





HCCAFFERV 


A 


HEGON 


C 


NACKSBURC 


B 


HANI 


C 


MARTINSVILLE 


B 


MCCAIN 


C 


HEHL 


c 


MACOMB 


B 


MANILA 


c 


HART1NTON 


C 


NCCALEB 


B 


HEHLHORN 


C 


MACOMBER 


B 


MANISTEE 


8 


HARTY 


B 


HCCALLY 


D 


MEIGS 




MACON 


B 


HANITOU 


C 


HARVAN 





HCCAMNON 





MEIKLE 





MAC* 


B 


MANLE-V 


B 


HARVELL 


B 


MCCANN 


C 


MEISS 


D 


NAOALIN 





HANL1US 


C 


HARVIN 


C 


MCCARRAN 





MELBOURNE 


B 


HAOAMASKA 


B 


HANLOVE 


B 


MARY 


C 


MCCARTHY 


8 


HELBY 


C 


HADDOCK 


A 


NANKING 


B 


HARYDEL 


B 


MCCLAVE 


C 


HELITA 


B 


KADOOX 




HANOGUE 


D 


MARYSLAND 





HCCLEARY 


C 


HELLENTHIN 





NADELIA 


C 


HANOR 


8 


MAS ADA 


C 


HCCLELLAN 


B 


NELLOR 


D 


MADELINE 





HANSF4ELO 





MASCANP 


D 


HCCLOUD 


C 


HELLOTT 


B 


MADERA 


D 


HANSIC 


8 


MASCHETAH 


B 


MCCOIN 





HELOLAND 


C 


MADISON 


B 


HANSKER 


B 


HASCOTTE 


D 


MCCOLL 





HELROSE 


c 


MADONNA 


C 


HANTACHIE 


C 


MASHEL 


C 


MCCONNEL 


6 


HELSTONE 


A 


MADRAS 


C 


HANTEO 


C/O 


HASHULAV'LLE 


B/O 


MCCOOK 


B 


HELTON 


B 


MADRID 


B 


HANTER 


8 


MASON 


8 


MCCORMICK 


C 


HELVILLE 


B 


HA DRONE 


C 


HANTON 


B 


MASON ILLE 


C 


MCCOY 


C 


KELVIN 


D 


MADUREZ 


B 


HANTZ 


B 


MASSACK 


8 


NCCREE 


8 


HE MA LOOSE 


D 


HAFURT 


B 


HANU 


C 


MASSENA 


C 


HCCRORV 


D 


MEMPHIS 


8 


HA GALLON 


B 


HANVEC 


c 


MASSILLON 


B 


HCCROSKIE 


D 


NENAHGA 


A 


HAG ENS 


B 


MANHOOD 





MASTERSON 


B 


NCCULLOUGH 


C 


HENAN 


C 


HAGGIE 





MANZ ANITA 


c 


MATAGORDA 





HCCULLV 


C 


HENARD 


B 


HAGINNIS 


C 


HANZANO 


c 


MATAMOROS 


C 


MCCUNE 





HENCH 


C 


MAGNA 





MANZANOLA 


c 


HATANUSF-A 


c 


NCCUTCHEN 


C 


HENDE60URE 


C 


HAGNOLIA 


B 


NAPES 


c 


NAT A HZ AS 


B 


MCDOLE 


8 


MENDOCINO 


8 


MAGNUS 


C 


MAPLE MOUNTAIN 


6 


M.TAPEAKE 


B 


MCDONALD 


8 


MENOON 


8 


HAGOTSU 


D 


HAP LE TON 


C/O 


NAT AM AN 


c 


MCDONALDSVILLE 


C 


MENDOTA 


8 


HAGUAVO 


D 


HARAGUEZ 


B 


MATCHER 


A 


NCEMEN 


8 


MENEFEE 





HAHAFFEV 


C/D 


MARATHON 


B 


HATFIELD 


C 


MCFADDEN 


8 


NENFRO 


B 


HAHAFFV 


C/0 


MARBLE 


A 


4AT.1EF.S 


8 


MCFAIN 


C 


HENLO 


D 


HAHALA 


c 


HARBL6MOUNT 


B 


MATHERTON 


8 


HCFAUL 


c 


HENO 


C 


HAHALASVILLE 


B/D 


NARCELINAS 





BATHES Of! 


8 


MCGAFFEY 


8 


MENOKEN 


C 


HAHANA 


B 


MARCETTA 


A 


MAT HENS 




NCGARR 


C 


HENOHINEE 


B 


MAHASKA 


B 


HARCIAL 


D 


MATHIS 


A 


HCGARY 


C 


MENTO 


C 


MA HER 


C 


HARCUH 


B 


HATHISTON 


C 


HCGEHEE 


c 


HENTOR 


8 


MAHONING 


D 


MARCUS 


C 


HAT LOCK 





HCGILVERV 





HEOUON 


c 


HAHUKONA 


B 


HARCUSE 


D 


MATHON 


D 


HCGINTY 


8 


MERCED 


C/D 


MAIDEN 


B 


MARCV 





NATTAPEX 


C 


HCGIRK 


C 


HERCEDES 


D 


HAILE 


A 


HARDEN 


c 


MATTOLE 


c 


HCGOWAN 


8 


MERCER 


C 


MAINSTAY 





HARDIN 


c 


NAU 





HCGRATH 


8 


HERCEY 


c 


HAJADA 


8 


MARENGO 


C/D 


MAUDE 


8 


HCGREW 


A 


MEREDITH 


8 


HAKAALAE 


B 


MARESUA 


B 


HAUGHAN 


C 


MCHENRY 


B 


NERETA 


C 


MAKALAPA 





MARGE RUM 


8 


HAUKEY 


C 


NCIL MAINE 


A 


HERGEL 


8 


HAKAFILI 


A 


MARGUERITE 


B 


KAUHEE 


A/0 


HCINTOSH 


B 


MERIDIAN 


8 


NAKAHAO 


B 


MARIA 


B/C 


HAUNABO 


D 


HCINTYRE 


8 


MERINO 





MAKAHELI 


B 


MARIANA 


c 


HAUPIN 


C 


HCKAHIE 


D 


NERKEL 


B 


HAKENA 


B 


MARIAS 





HAUREPAS 





MCKAY 


D 


HERLIN 





HAKIKI 


B 


HARICAO 


B 


MAURICE 


A 


MCKENNA 


C/D 


HERMILL 


B/D 


HAKLAK 


A 


HARICOPA 


B 


HAURINE 


D 


MCKENZIE 


D 


MERNA 


D 


NAKOTI 


C 


HARIETTA 


c 


MAURY 


-8 


MCKINLEY 


B 


MEROS 


A 


HAL 


B 


HARILLA 


C 


MAVERICK 


C 


NCKINNEV 


D 


HERRIFIELD 


B 


MALA 


B 


MARINA 


A 


MAVIE 


D 


MCLAIN 


C 


MERRILL 


C 


MALABAR 


A/0 


MARION 


D 


HAUAE 


A 


NCLAURIN 


B 


MERRILLAN 


c 


MALABON 


C 


MARIPOSA 


C 


MAX 


8 


MCLEAN 


C 


NERRINAC 


A 


NALACHY 


B 


MARISSA 


C 


HAXEV 


C 


MCLEOD 


B 


MERRITT 


B/C 


MALAGA 


B 


HARKES 


D 


HAXFIELO 


C 


HCHAHON 


C 


MER ROUGE 


8 


HALAHA 


A 


MARKET 


D 


HAXSON 


A 


NCHEEN 


c 


HERTON 


8 


MALAYA 





HARKHAH 


C 


MAXTON 


8 


HCMULLIN 


D 


HERTZ 


8 


HALBIS 


B 


MARKLAMD 


C 


HAXVILLE 


A 


HCMUROIE 


C 


MESA 


B 


MALCOLM 


B 


MARKSBORO 


C 


HAXMELL 





HCMURPHV 


B 


MESCAL 


8 


HALETTI 


C 


HARLA 


A 


MAY 


8 


MCHURRAV 


D 


HESCALERO 


C 


HALEZA 


B 


MARLBORO 


8 


MAYBERRV 


C 


HCNARV 


D 


MESITA 


C 


HALIBU 


D , 


HARLEAN 


B 


MAYBESO 


D 


MCPAUL 


B 


ME SKILL 


c 


NOTES 


A 


BLANK HVOROLOGIC 


SOIL 


GROUP INDICATES 


THE SOIL GROUP HAS NOT 


BEEN 


DETERMINED 




TMO SOIL GROUPS SUCH AS 


B/C INDICATES THE DRAINEO/UNDRAINED SITUATION 







NEH Notice U-102, August 1972 



135 



Table A3, (continued). 



KESHAN 


C 


MINORA 


C 


MONT OVA 


D 


HUROOCK 


C 


NAVARRO 


B 


NESPUN 


A 


HINTO 


C 


HONTPELLIER 


C 


HUREN 


B 


NAVESINK 




NESSER 


C 


HINU 





MONTROSE 


B 


HURRILL 


B 


NAYLOR 




NET 


D 


HINVALE 


B 


MONTVALE 





HURVILLE 


D 


NAYPED 


C 


HETALINE 


B 


HIRA 


D 


MONT VE ROE 


A/D 


MUSCATINE 


B 


NAZ 


B 


NETANORA 


B 


HIRABAL 


C 


HONTHEL 


C 


NUSE 


C 


N-BAR 


B 


METEA 


B 


HIRACLE 


B 


MONUE 


\b 


HUSELLA 


B 


NEAPOLIS 


B/D 


NETHOM 


B 


HIRAHAR 


B 


MOODY 


B 


HUSICK 


B 


NEBEKER 


C 


NETIGOSHE 


A 


MIRANDA 


D 


MOOHOO 


B 


HUSINIA 


a 


NE9GEN 


D 


HETOLIUS 


B 


MIRES 


B 


KOOSE RIVER 





HUSKINGUM 


C 


NEBISH 


B 


METRE 





MIRROR 


6 


HORA 


B 


HUSKOGEE 


c 


NEBO 




MET! 


A 


MIRROR LAKE 


A 


HORAOO 


C 


HUSQUIZ 


c 


NECHE 


C 


MEXICO 


D 


MISSION 


B 


MORALES 





HUSSEL 


B 


NEDERLAND 


B 


NHOON 


D 


HITCH 


B 


MDRD 


C 


MUSSELSHELL 


B 


NEEDHAH 


D 


MIAMI 


B 


HITCHELL 


B 


HOREAU 


D 


HUSSEY 


D 


NEEOLE PEAK 


C 


MI AH I AN 


C 


HITIUANGA 


C 


HOREHEAD 


C 


HUSTANG 


A/D 


NEEDH3RE 


C 


Hi CCO 


A/0 


HITRE 


C 


MOREHOUSE 


C 


HUTNALA 


B 


HEELEY 


B 


MICHELSON 


B 


HIZEL 


D 


MORE LAND 





HUTUAL 


B 


NEESOPAH 


C 


HICHICAMHE 


C 


HIZPAH 


C 


MORELANDTON 


A 


HVAKKA 


A/D 


NEGITA 


B 


HICK 


B 


HO A NO 





HORET 





HYATT 


B/D 


NEGLEY 


B 


MIDAS 


D 


HOAPA 


D 


MOREY 


D 


HVERS 


D 


NEHALEH 


B 


MIDDLE 


C 


MOAULA 


A 


MORFIT1 


B 


HYERSVILLE 


B 


NEHAR 


B 


HIDDLEBURY 


B 


HOBEET1E 


B 


MORGANF1ELD 


B 


HVLREA 


B 


NEILTON 


A 


NIDESSA 


8 


HOCA 


D 


MORGNEC 




HVRICK 





NEISSON 


B 


MIDLAND 


D 


HOC HO 


B 


MORI ARTY 





MYRTLE 


B 


NEKIA 


C 


MIDNIGHT 





HOOA 


D 


MORICAL 


C 


NYSTEN 


A 


NELLIS 


6 


HI OVALE 


C 


MOOALE 


C 


MORLEV 


C 


NYSTIC 





NELHAN 


B 


NIDUAV 





MODEL 


C 


MORMON MESA 


D 


HVTON 


B 


NEL SCOTT 


B 


MIFFLIN 


B 


MODENA 


B 


MOROCCO 


A/C 






NELSON 


B 


MIFFLIMBUAG 


B 


MOOESTO 


C 


MORONI 


D 


NAALEHU 


B 


NENAH 


C 


NI6UEL 


D 


MODOC 


C 


NOR OP 


C 


NABESNA 


D 


NEMOTE 


A 


NIKE 


D 


HOENKOPIE 





MORRILL 


B 


NACEV ILLE 


C 


NENANA 


B 


NIKESELL 


C 


HOEPITZ 


6 


MORRIS 


C 


NACHES 


B 


NENNO 


B 


NILACA 


B 


MOFFAT 


B 


MORRISON 


B 


NACIHIENTO 


C 


NEOLA 


D 


HILAN 


B 


MOGOLLON 


B 


MORROW 


C 


NACOGDOCHES 


B 


NEOTONA 


B 


HUES 


B 


HOGUL 


B 


MORSE 





NADEAN 


B 


NEPALTO 


A 


HILFORD 


C 


HOHALL 


B 


MORTENSON 


c 


NADINA 


D 


NEPESTA 


C 


HILHAH 


c 


HOHAVE 


B 


MORTON 


B 


NAFF 


a 


NEPHI 


B 


HILHEIM 


L 


MOHAWK 


B 


HORVAL 


B 


NAGEESI 


B 


NEPPEL 


B 


HILL 


B 


H01RA 


C 


MOSBY 


C 


NAGITSV 


C 


NEPTUNE 


A 


MILLARD 


B 


HOKELUHNE 


D 


HOSCA 


A 


NAGLE 


B 


NE4ES0N 


8 


HILLBORO 


D 


HOKENA 


C 


MOSCOW 


C 


NAGOS 


D 


NESDA 


A 


HILLBROOK 


B 


HOKIAK 


B 


NOSEL 


c 


NAHATCHE 


C 


NESHANINY 


B 


HILL BURN E 


B 


HOKULEIA 


B 


HOSHANMON 


B 


NAHHA 


C 


NESIKA 


B 


HILLCREEK 


B 


HOLAND 


B 


HOSHER 





NAHUNTA 


C 


NESKAHI 


B 


MILLER 





HOLCAL 


B 


HOSHERVILLE 


c 


NAIWA 


B 


NESKOWIN 


C 


MILLERLUX 


D 


HOLENA 


A 


MOSIDA 


B 


NAKAI 


B 


NESPELEH 


B 


HILLERTON 


0/ 


HOLINOS 


B 


MOSQUE T 


D 


NAKNEK 


D 


NESS 


D 


HILLETT 


6 


HOLLVILLE 


D 


MOSSY ROCK 


B 


NALDO 


B 


NESSEL 


B 


NILLGROVE 


B/O 


HOLLY 


B 


MOTA 


B 


NAHBE 


B 


NESSOPAH 


B 


MILL HOLLOW 


B 


HOLOKAI 


B 


HOT LEY 


B 


NAHON 


C 


NESTER 


C 


HILLICH 


D 


HOL SON 


B 


MOTOOUA 





NANAMKIN 


A 


NESTUCCA 


C 


HILLIKEN 


c 


HOLYNEUX 


B 


HOTTSVILLE 


A 


NANCY 


B 


NETARTS 


A 


HILLINGTON 


B 


MONAD 


A 


NOULTON 


a/B 


NANNY 


B 


NETCONG 


B 


NILLIS 


C 


HONAHAN 





HOUNO 


c 


NANNY TON 


B 


NETO 


B 


HILLRACE 


B 


HONAHANS 


B 


HOUNTAINBURG 


D 


NANSENE 


6 


NETTLETON 


C 


MILLSAP 


C 


MONARDA 


D 


HOUNTAINVIEW 


B/O 


NANTUCKET 


C 


NEUBEUT 


B 


HILLSDALE 


6/0 


HONCLOVA 


B 


HOUNTAINVILLE 


B 


NANUM 


C 


NEUNS 


B 


MILLSHOLH 


C 


HONDAMIN 


C 


MOUNT AIRY 


A 


NAPA 


D 


NEUSKE 


B 


MILLVILLE 


B 


HONDOVI 


B 


MOUNT CARROLL 


B 


NAPAISHAK 


D 


NEVADOR 


C 


MILL MOOD 


D 


KONEE 





MOUNT HOME 


B 


NAPA VINE 


B 


NEVILLE 


B 


MILNER 


C 


HON I CO 


B 


MOUNT HOOD 


6 


NAPIER 


B 


NEVIN 


C 


HILPITAS 


C 


HONIDA 


B 


MOUNT LUCAS 


C 


NAPLENE 


B 


NEVINE 


B 


HILROV 





HONITEAU 





MOUNT OLIVE 


D 


NAPLES 


9 


NEVKA 


C 


HILTON 


C 


MONMOUTH 


C 


MOUNTVIEW 


B 


NAPPANEE 


D 


NEVOVER 


D 


HIHBRES 


C 


MONO 


D 


MOVILLE 


C 


NAPTOMNE 


B 


NEVTAH 


C 


HIHOSA 


C 


HOHOLITH 


C 


NOWATA 





NARANJITO 


C 


HEVU 


D 


HINA 


c 


MONONA 


B 


MOWER 


c 


NARANJO 


C 


NEWARK 


C 


HI NAN 


B 


HONONGAHELA 


C 


MOVERS ON 


D 


NARCISSE 


B 


NEWART 


B 


NINATARc 


D 


HONROE 


B 


NOVINA 


D 


NARD 


B 


NEWAYGO 


6 


HINCHEV 


B 


HONROEVILLE 


C/O 


HUCARA 





NARLON 


C 


NEWBERG 


B 


HINCO 


B 


HON St 


6 


HUCfcT 


C 


NARON 


B 


NEWBERRY 


C 


HINDALE 


B 


HONSERATE 


C 


MUORAY 





NARRAGANSETT 


B 


NEWBY 


B 


NINOE60 


B 


HONTAGUE 


D 


HUD SPRINGS 


c 


NARROWS 





NEW CAMBRIA 


C 


NINDEHAN 


B 


HONTALTO 


C 


MUGHOUSE 


c 


NASER 


a 


NEWCASTLE 


B 


MINDEN 


C 


HONTARA 





MUIR 


B 


NASH 


B 


NEWCOMB 


A 


NINE 


B 


HONTAUK 


c 


HUIRKIRK 


B 


NASHUA 


A 


NEWOALE 


B 


NINEOLA 




HONTCALM 


A 


MUKILTEO 





NASHVILLE 


B 


NEWELL 


S 


MINER 


D 


HONTE 


B 


HULCROW 


D 


NASON 


C 


NEWELLTON 





MINERAL 


A 


HONTE CRISTO 





MULKEY 


C 


NASSAU 


C/D 


NEWFANE 




MINERAL HOUNTAIN 


C 


HONTE GRANDE 





MULL INS 


D 


NASSET 


B 


NEWFOKK 


D 


NINERVA 


B 


HON TELL 


D 


MULLINVILLE 


B 


NATAL IE 


C 


NEWKIRK 


D 


MING 


B 


HONTE LLO 


C 


HULT 


C 


NATCHEZ 


B 


NEWLANDS 


B 


MINGO 


B 


MONTEOLA 


D 


HULTORPOR 


A 


NATHROP 


a 


NEWLIN 


B 


MINIDOKA 


C 


HONTEROSA 





HUHFORO 


B 


NATIONAL 


a 


NEWMARKET 


6 


MINNEISKA 


C 


MONTE VALLO 





MUNDELEIN 


B 


NATRONA 


B 


NEWPORT 


C 


H1NNEOSA 


B 


MONTGOMERY 


D 


HUNOOS 


B 


NATROY 


D 


NEWRUSS 


B 


HINNEOUA 


8 


HONTICELLO 


B 


MUNISING 


B 


NATUR ITA 


a 


NEWRY 


B 


HI NNE TONKA 





HONTIETH 


A 


HUNK 


C 


N AUK ATI 


D 


NEWSKAH 


6 


HINNEMAUKAN 


B 


HONTHORENCI 


B 


HUNS ON 


D 


NAUHBURG 


c 


NEWSTEAD 





HINNIECE 





HON TO SO 


B 


MUNUSCONG 


D 


NAVAJO 


D 


NEWTON 


A/D 


MINOA 


C 


HON TOUR 





HURDO 


B 


NAVAN 


D 


NEWTONIA 


B 


NOTES 


A 


BLANK HYORQLOGIC 


SOIL 


GROUP INDICATES 


THE SOIL GROUP HAS NOT 


BEEN 


OETERMINEO 




TWO SOIL GROUPS SUCH AS 


a/c 


INOICATES THE ORAINEO/UNDRAINEO SITUATION 







NEH Notice U-102, August 1972 



136 



Table A3, (continued). 



NEHTOMN 


C 


NORTON 


C 


ORAM 





OREL LA 


D 


PACK 


C 


NEWVILLE 


c 


NORTONVILLE 


C 


OKAY 


a 


ORE* 




PACKARD 


a 


NEZ PERCE 


c 


NOR TUNE 


D 


OKEECHOBEE 


A/D 


OREST INBA 




PACKER 


c 


NIAGARA 


c 


NORWALK 


B 


OKEELANTA 


A/D 


ORFORD 




PACKHAM 


B 


NIART 


B 


NOR MAY FLAT 


a 


OKEHAH 


C 


ORIDIA 




PACKSADOLE 


6 


NIBLEV 


c 


NORHELL 


C 


OKLARED 


a 


ORIF 




PACKWOOD 


D 


NICHOLSON 


c 


NORWICH 


D 


OKLANAHA 


A/0 


ORIO 




PACOLET 


B 


NICHOLV1LLE 


c 


NORWOOD 


8 


OKHOK 


a 


ORION 




PACTOLUS 


C 


NICKEL 


B 


NOT I 





OKO 


D 


ORITA 




PADEN 


C 


NICOOENUS 


B 


NOTUS 


A/C 


OKOBOJI 


c 


ORLANO 




PADRONI 


a 


NICOLAUS 


C 


NOUQUE 





OKOLONA 


D 


ORLANDO 




PADUCAH 


B 


NICOLLET 


B 


NOVARA 


a 


OKREEK 


D 


ORMAN 




PAOUS 


a 


NIELSEN 





NO VARY 


a 


OKTIBBEHA 





ORMSBV 


B/C 


PAESL 


B 


NI6HTHAMK 


B 


NOW OOO 


c 


OLA 


C 


ORODELL 




PAGET 


a 


NIHILL 


B 


NOVO 


c 


OLAA 


A 


ORO FINO 




PAGODA 


c 


NIKABUNA 


D 


NOV SON 


c 


OLALU 


C 


ORO GRANDE 




PAHRANAGAT 


c 


NIKEY 


B 


NUBY 


C/D 


OLANTA 


a 


ORONO 




PAHREAH 





NIKISHKA 


A 


NUCKOLLS 


C 


LATHE 


C 


OROVADA 




PAHROC 


D 


NIKLASON 


a 


NIX LA 


B 


OLD CAHP 





ORPHANT 




PAIA 


C 


NIKOLAI 





NUECES 


C 


OLDHAM 


C 


ORA 




PAICE 


C 


NILAND 


c 


NUGENT 


A 


OLDS 





ORRVILLE 




PAINESVILLE 


c 


NILES 


c 


NUGGET 


C 


OLDSMAR 


B/0 


ORSA 




PAINTROCK 


c 


NINROD 


c 


NUMA 


c 


OLDHICK 


a 


ORSINO 




PAIT 


a 


NINCH 


c 


NUNOA 


C 


OLELO 


a 


ORTELLO 




PAJARITO 


a 


NINEHILE 





NUNICA 


c 


OLENA 


a 


ORTIGALITA 




PAJARO 


C 


NINEVEH 


B 


NUNN 


C 


OLE QUA 


a 


ORTING 




PAKA 


B 


NINIGRET 


B 


NUSS 


D 


OLETE 


c 


ORTIZ 




PAKALA 


B 


NININGER 


a 


NUTLEV 


C 


OLEX 


a 


ORTLEY 




PAKINI 


B 


NINNESCAH 


( 


NUTRAS 


c 


OLGA 


c 


ORHET 




PALA 


a 


NIOBELL 


c 


NUTRIOSO 


a 


OLI 


B 


ORWOOD 




PALACIO 


a 


NIOTA 





NUVALDE 


C 


OLIAGA 


B/D 


OSAGE 




PALAPALAI 


B 


NIPE 


a 


NYALA 





OLI NO A 


B 


OSAKIS 




PALATINE 


B 


NIPPERSINK 


a 


NYHORE 


A 


OLIPHANT 


B 


OSCAR 




PALESTINE 


B 


NIPPT 


A 


NVSSA 


C 


OLIVENHAIN 





OSCURA 




PALISADE 


B 


NIPSUH 


C 


NYSSATON 


B 


OLIVER 


a 


OSGOOD 


B 


PALHA 


a 


NIRA 


B 


NVSTROM 


C 


OLIVIER 


C 


OSHA 


B 


PALNAREJO 


c 


NISHNA 


C 






OLJETO 


A 


OSHAWA 


D 


PALM BEACH 


A 


NISHON 





OAHE 


B 


OLMITO 





O'SHEA 


C 


PALMER 





NISQUALLY 


A 


OAKOALE 


a 


OLHITZ 


a 


OSHKOSH 


C 


PALMER CANYON 


B 


NISSWA 


B 


OAKDEN 





OLMOS 


c 


OSHTEMO 


B 


PALMICH 


B 


NIU 


B 


OAKFORD 


a 


OLHSTFO 


a/o 


OS IE* 


B/D 


PALMS 





NIULII 


C 


OAK GLEN 


B 


OLNEY 


a 


OSKA 


C 


PALMYRA 


a 


NIVLOC 





OAK GROVE 


C 


OLOKUI 





OSMUND 


B 


PALO 


a 


NIWOT 


c 


OAK LAKE 


a 


OLPE 


c 


oso 


B 


PALODURO 


a 


NIXA 


c 


OAKLAND 


C 


OLSON 


D 


OSOBB 





PALOHAS 


a 


NIXON 


a 


OAKS RIDGE 


C 


OLTON 


c 


OSORIDGE 





PALOMINO 


D 


NIXONTON 


B 


0AKV1LLE 


A 


OLUSTEE 


B/0 


OSOTE 




PALOS VERDES 


a 


NIZINA 


A 


OAKMOOD 


D 


OLVIC 


a 


OSS I AN 




PALOUSE 


a 


NOBE 





OANAPUKA 


a 


OLYMPIC 


a 


OST 




PALSGAOVE 


a 


NOBLE 


B 


OASIS 


a 


OHADI 


a 


OSTRANOER 




PAMLICO 


D 


NOB SCOTT 


A 


OAT HAN 


a 


OMAHA 


a 


OTERO 




PANOA 


C 


NOCKEN 


c 


OBAN 


c 


OMAK 


c 


OTHELLO 




PANSDEL 





NODAWAY 


B 


OBARC 


a 


OMEGA 


A 


OTIS 




PANUNKEY 


c 


NOEL 





OBEN 


c 


OMENA 


B 


OTISCO 




PANA 


« 


NOHILI 





OBRAST 


D 


OMNI 


c 


OTISVILLE 




PANACA 





NOKASIPPI 





OBRAY 


D 


ONA 


A/D 


OTLEY 




PANAENA 





NOKAY 


c 


OBURN 





ONALASKA 


a 


OTSEGO 




PANASOFFKEE 


D 


NOKOHIS 


a 


OCALA 





ONANIA 


a 


OTTER 


B/D 


PANCHERI 


a 


NOLAN 


B 


OCEANET 


D 


ONARGA 


a 


OTTERBEII 




PANCHUELA 


c 


NOLICHUCKY 


a 


OCEANO 


A 


ON AW A 





0TTERH0L1 




PANDO 


B 


NOLIN 


B 


OCHEVEDAN 


a 


ONAWAV 


a 


OTTOKEE 




PANDOAH 


c 


NOLO 


B 


OCHLOCKONEE 


B 


ONOAMA 


a 


OTWAV 




PANDORA 





NONE 





OCHO 





ONEIDA 


a 


OTWELL 




PANDURA 





NONOALTON 


a 


OCHOCO 


c 


O'NEILL 


a 


OUACHITA 




PANE 


B 


NONOPAHU 





OCHOPEE 


ft/0 


ONEONTA 


a 


OURAY 




PANGUI TCH 


• 


NOOK AC HA HP S 


c/o 


OCJLLA 


c 


ONITA 


c 


OUTLET 




PANHILL 


B 


NOOKSACK 


a 


OCKLEV 


B 


ONITE 


a 


OVALL 




PANIOGUE 


a 


NOONAN 





OCOEE 


A/D 


ONOTA 


c 


OVERGAARD 




PANKV 


c 


NORA 


a 


OCONEE 


c 


ONOVA 


D 


OVERLAND 




PANOCHE 


B 


NORAD 


a 


OCONTO 


a 


ONRAV 


c 


OVERLY 




PANOLA 





NORBERT 





OCOSTA 


D 


ONSLOW 


B 


OVERTON 




PANSEY 





NOR BORNE 


a 


OCQUEOC 


B 


ONTARIO 


a 


OVID 




PANTEGO 





NORBY 


a 


OCTAGON 


a 


ONTKO 


B/0 


OVINA 




PANTHER 





NORO 


a 


ODEE 





ONTONAGON 





OMEGO 




PANTON 





NOROBY 


a 


ODELL 


a 


ONYX 


a 


OMEN CREEK 




PAOLA 


A 


NORDEN 


a 


ODEH 


A 


OOKALA 


A 


OWENS 




PAOLI 


a 


NORONESS 


a 


ODERHOTT 


c 


OPAL 





OWHI 




PAONIA 


c 


NORFOLK 


a 


ODESSA 


D 


OPEQUON 


C/D 


OWOSSO 




PAPAA 





NORGE 


a 


ODIN 


C 


OPHIR 


C 


OWYHEE 




PAPAI 


A 


NORKA 


a 


OONE 


C 


OPIHIKAO 





OXALIS 




PAPAKATING 





NORMA 


a/c 


O'FALLON 





OPPIO 





OXBOW 




PAPOOSE 


c 


NORMAN GEE 





OGDEN 


D 


OQUAGA 


c 


OXERINE 




PARAOISE 


c 


NORREST 


c 


OGEECHEE 


C 


ORA 


C 


OXFORD 




PARADOX 


B 


NJRRIS 


c 


OGEHAN 


c 


OR AN 


a 


OZAMIS 


B/0 


PARALONA 


C 


NORRISTJN 


a 


OGILVIE 


c 


ORANGE 





OZAN 




PARANORE 





N3RTE 


B 


OGLALA 


B 


ORANGEBURG 


a 


OZAUKEE 




PARASOL 


• 


NORTHDALE 


c 


OGLE 


a 


ORCAS 









PARCELAS 





NORTHFULD 


B 


OHAYSI 


D 


ORCHARD 


a 


PAAIKI 


B 


PARDEE 





NORTHNORfc 


C 


UHIA 


A 


ORD 


A 


PAALOA 


B 


PAREHAT 


C 


NORTHPORT 




OJAI 


a 


ORDNANCE 


C 


PAAUHAU 


A 


PARENT 


c 


NORTH POWDER 


c 


OJATA 





OROWAV 


D 


PACHAPPA 


a 


PARIETTE 


c 


NORTHUMBERLAND 


C/D 


OKANOGAN 


a 


OREL I A 





PACHECO 


B/C 


PARIS 




NOTES 


A 


BLANK HYDROLOGIC 


SOIL 


GROUP INDICATES THE SOIL GROUP HAS NOT BEEN 


DETERMINED 




TWO SOIL GROUPS SUCH AS 


a/c 


INDICATES THE DRAINEO/UNDRAINED SITUATION 







NEH Notice U-102, August 1972 



137 



Table A3, (continued). 



PARISHVILLE 


C 


PELIC 





PICAYUNE 


B 


PLEASANT VIEW 


8 


POS. 




PARKA T 


B 


PELLA 





PICKAWAY 


C 


PLEDGER 


D 


POTAHO 




PARKDALE 


8 


PELLEJAS 


B 


PICKENf 





PLEEK 


C 


POTH 




PARKE 


B 


PELONA 


C 


PICKET. 


B 


PLEINE 


D 


POTLATCH 




PARKER 


B 


PELUK 





PICKFORD 


D 


PLEVNA 





POTRATZ 




PARKFIELO 


C 


PEHBERTON 


A 


PICKRELL 





PLONE 


a 


POTSDAM 




PARKHILL 





PEMBINA 


C 


PICKWICK 


B 


PLOVER 


a 


POTTER 




PARKHURST 




PEMBROKE 


B 


PICO 


8 


PLUMAS 


a 


POTTS 




PARKINSON 


B 


PENA 


B 


PICOSfc 


C 


PLUHNER 


B/D 


POUDRE 




PARKVIEW 




PENCE 


A 


PICTOU 


B 


PLUSH 


B 


POULTNEV 




PARKVILLE 




PENOEN 


B 


PIE CREEK 


D 


PLUTH 


a 


POUNCEV 




PARKWOOO 


A/O 


PEND OREILLE 


B 


PIERIAN 


A 


PLUTO S 


c 


POVERTY 




PARLEYS 




PENOROY 





PIERPONT 


C 


PLYMOUTH 


A 


POWDER 




PARLIN 




PENELAS 





PIERRE 





POALL 


C 


POWDERHORN 




PARLO 




PENINSULA 


C 


PIERSONTE 


B 


POARCH 


a 


POWELL 




PARNA 


C 


PENISTAJA 


B 


PIIHONUA 


A 


POCALLA 


A 


POWER 




PARNELL 





PENITENTE 


B 


PIKE 


8 


POCATaLO 


a 


POWHITE 




PARR 


B 


PENLAN 


C 


PILCHUCK 


A 


POCKER 


O 


POWLEY 




PARRAN 





PENN 


c 


PILGRIM 


B 


POCOHOKE 


D 


POWWATKA 




PARRISH 


c 


PENNEL 


c 


PILOT 


B 


POOO 





POV 




PARSHALL 


B 


PENNINGTON 


B 


PILOT ROCK 


C 


POOUNK 




POVGAN 




PARSIPPANV 





PENO 


c 


PIMA 


B 


POE 


a/c 


POZO 


C/O 


PARSONS 





PENOYER 


c 


FINER 


B 


POEVILLE 




POZO BLANCO 




PARTRI 


c 


PENROSE 





PINAL 





POGAL 




PRAG 




PASAGSHAK 





PENSORE 





PINALENO 


B 


POGANEAB 




PRATHER 




PASCO 


B/C 


PENTHOUSE 





PINAMT 


B 


POGUE 




PRATLEV 




PASO SECO 





PENTZ 





PI NAT A 


C 


POHAKUPU 




PRATT 




PASQUETTI 


C/D 


PENNELL 


A 


PINAVETES 


A 


POINOEXTER 




PREACHER 




PASQUOTANK 


B/O 


PENWOOO 


A 


PINCHER 


C 


POINSETT 




PREAKNESS 




PASSAR 


c 


PEOGA 


c 


PINCKNEY 


C 


POINT 




PREBISH 




PASS CANYON 





PEOH 


c 


PINCONNING 


D 


POINT ISABEL 




PREBLE 




PASSCREEK 


c 


PEONE 


B/C 


PINCUSHION 


B 


POJDAQUE 




PRENTISS 




PASTURA 





PEORIA 





PINEDA 


B/D 


POKEGEMA 




PRESQUE ISLE 




PATAHS 


B 


PEOTONE 


c 


PINEDALE 


B 


POKEMAN 




PRESTO 




PATENT 


C 


PEPOON 


B 


PINEGUEST 


6 


POKER 




PRESTON 




PATILLAS 


B 


PEQUEA 


c 


PINELLOS 


A/O 


POLAND 




PREWITT 




PATILO 


C 


PERCHAS 





PINETOP 


C 


POLAR 




PREY 




PATIT CREEK 


B 


PERCIVAL 


c 


PINEVILLE 


8 


POLATIS 




PRICE 




PATNA 


B 


PERELLA 


c 


PINEV 


C 


POLE 




PR I DA 




PATOUTVILLE 


C 


PERHAM 


c 


PINICON 


8 


P0LE6AR 




PRIOHAM 




PATRICIA 


B 


PER ICO 


B 


PINKEL 


C 


POLEL INE 




PRIETA 




PATRICK 


B 


PERITSA 


c 


PINKHAN 


B 


POLEO 




PRINEAUX 




PATROL E 


C 


PERKINS 


c 


PINKSTON 


B 


POLEV 




PRINGHAR 




PATTANI 





PERKS 


A 


PINNACLES 


C 


POLICH 




PRINCETON 




PATTEN BURG 


B 


PERLA 


c 


PINO 


C 


POLLARD 




PRINEVILLE 




PATTER 


C 


PERMA 


A 


PINOLA 


C 


POLLASKY 




PRING 




PATTERSON 


C 


PERNANENTE 


C 


PINOLE 


B 


POLLY 




PRINS 




PATTON 


BSD 


PERRIN 


B 


PINON 


C 


POLO 




PRITCHETT 




PATHAY 


c / 


PERRINE 





PINONES 


D 


POLSON 




PROCTOR 




PAUL 


B 


PERROT 


D 


PINT AS 


D 


POLVADERA 




PROGRESSO 




PAULOING 





PERRY 





PINTLAR 


A 


POMAT 




PROMISE 




PAULINA 





PERRVPARK 


B 


PINTO 


C 


POMELLO 




PROMO 




PAULSELL 





PERRYVILLE 


B 


PINTURA 


A 


POMPANO 


A/D 


PROMONTORY 




PAULSON 


B 


PERSANTI 


C 


PI NT WATER 





POMPONIO 


C/D 


PRONG 




PAULVILLE 


B 


PERSAYO 





PIOCHE 


D 


POMP TON 




PROSPECT 




PAUMALU 


B 


PERSHING 


c 


PIOPOLIS 





POMROY 




PROSPER 




PAUNSAUGUNT 





PERSIS 


B 


PIPER 


a/c 


PONCA 




PROSSER 




PAUSANT 


B 


PERT 





PIROUETTE 


D 


PONCENA 




PROTIVIN 




PAUWELA 


B 


PERU 


c 


PI RUM 


B 


PONCHA 




PROUT 




PAVANT 





PESCAOERO 


c/o 


PISGAH 


c 


POND 


B/C 


PROVIOENCE 




PAY ILL ION 


B 


PESET 


c 


PISHKUN 


a 


POND CREEK 




PROVO 




PAVOHROO 


B 


PESHASTIN 


6 


PISTAKEE 


B 


POMOILLA 




PROVO BAY 




PAWCATUCK 





PESO 


C 


PIT 





PONIL 




PROWERS 




PAMLET 


B 


PETEETNEET 





PITTMAN 





PONTOTOC 




PTARMIGAN 




PAHNEE 





PETERBORO 


B 


PITTSFIELD 


a 


PONZER 




PUAULU 




PAXTON 


C 


PETERS 





PITTSTOWN 


c 


POOKU 




PUCHVAN 




PAXVILLE 





PETOSKEY 




PITTWOOO 


a 


POOLE 


B/D 


PUDDLE 




PAYETTE 


B 


PETRIE 





P1TZER 


c 


POOLER 




PUERCO 




PAYMASTER 


B 


PETROLIA 





PIUTE 


D 


POORHA 




PUERTA 




PAYNE 


C 


PETTOkS 


C 


PLACEOO 


D 


POPE 




PUETT 




PAVSON 





PEHAMO 


B/O 


PLACENTIA 





POPPLETON 




PUGET 


a/c 


PEACHAM 





PEYTON 


6 


PLACERITOS 


C 


POQUONDCK 




PUGSLEV 




PEARL HARBOR 





PFEIFFER 


a 


PLACID 


A/D 


PORRETT 


B/D 


PUHI 




PEARHAN 




PHAGE 


B 


PLACK 


D 


PORT 




PUHIMAU 




PEARSOLL 


D 


PHANTOM 


C 


PLAINFIELD 


A 


PORTACEVILLE 




PULASKI 




PEAV1NE 


C 


PHARO 


B 


PLAINVIEW 


C 


PORT ALES 




PULEHU 




PECATONICA 


B 


PHAROLIO 





PLAISTED 


c 


PORTALTO 




PULLMAN 




PECOS 





PHEBA 


C 


PLANO 


a 


PORT BYRON 




PULS 




PEOEE 


c 


PHEEhtV 


B 


PLASKETT 


D 


PORTERS 




PULSIPHER 




PEOERNALES 


c 


PHELAN 


B 


PLATA 


a 


PORTERVILLE 




PWLTNEV 




PEOIGO 


a/c 


PHELPS 


B 


PLATEA 


c 


PORTHILL 




PUNEL 




PEDLAR 





PHIFERSON 


B 


PLATEAU 


a 


PORT I NO 




PUMPER 




PEOOLI 


c 


PHILBON 


B/D 


PLATNER 


c 


PORT LAND 




PUNA 




PEORICK 


B 


PHILIPSBURG 


B 


PLATO 


c 


PORTNEUF 




PUMALUU 




PEEBLES 


c 


PHILLIPS 


C 


PLATORO 


a 


PORTOLA 




PUNOHU 




PEEL 


c 


PHILO 


B 


PLATTE 





PORTSMOUTH 




PURDAM 




PEELER 


B 


PHI LOMATH 





PUTTY I LIE 


a 


PORUN 




PURDV 




PEEVER 


c 


PHIPPS 


C 


PLAZA 


B/C 


POSANT 




PUftCATORV 




PEGLER 





PHOEBE 


B 


PLEASANT 


c 


POSEY 




PURNER 




PEGRAM 


B 


PHOENIX 





PLEASANT GROVE 


a 


POSITAS 




PURSLEY 




PEKIN 


C 


PI ASA 


D 


PLEASANTON 


a 


POSKIN 




PURVES 




PCLHAM 


B/O 


PICACHO 


C 


PLEASANT VALE 


a 


POSOS 




PUSTOI 




NJTES A 


BLANK HYOROLOGLC 


SOIL 


GROUP INOICATES 


THE SOIL GROUP HAS NOT 


BEEN 


DETERMINED 






TMO SOIL GROUPS SUCH AS 


B/C INDICATES THE DRAINED/UNDRAINEO SITUATION 







NEH Notice U-102, August 1972 



138 



Table A3, (continued). 



PUTNAM 


RANDMAN 


D 


REELFOOT 


C 


RIFFE 


8 


ROLETTE 




PUUKALA 


RANDOLPH 


D 


REESER 


C 


RIFLE 


A/D 


ROLFE 




PUUONE 


C RANDS 


C 


REESVILLE 


C 


RIGA 


D 


ROLISS 




PUU 00 


A RANGER 





REEVES 


C 


RIGGINS 


A 


ROLLA 




PUU OPAE 


B RANIER 


C 


REFUGE 


c 


RIGLEV 


B 


ROLLII 




PUU PA 


B RANKIN 


C 


REGAN 


B 


RILEY 


C 


ROLOFF 




PUVALLUP 


B RANTOUL 


D 


REGENT 


c 


RILLA 


B 


ROMBERG 




PVLE 


A RANYHAN 


B 


REHM 


C 


RILLITO 


8 


ROMBO 




PYLON 


D RAPELJE 


C 


REICHEL 


B 


RINEr 


C 


ROMEO 




PVOTE 


A RAPMO 


B 


REIFF 


B 


RIMINI 


A 


ROMNEY 




PYRANIO 


RAPIDAN 


B 


RE ILLY 


A 


RIMROCK 


D 


ROMULUS 




PVRHONT 


RAPLEE 


C 


REINACH 


B 


RIN 


B 


ROND 






RARDEN 


c 


REKOP 


D 


RINCON 


C 


RONNEBV 




QUACKENBUSH 


C RARICK 


B 


RELAN 


A 


RINCONAOA 


C 


RONSON 




QUAKER 


C RARITAN 


C 


RELAY 


B 


RINDGE 


D 


ROOSE* 




QUAKEATOWN 


B RASBAND 


B 


RELIANCr 


C 


RINGLING 


I 


ROOTEL 




QUAM3A 


RASSET 


B 


RELIZ 


D 


RINGO 


D 


ROSACHI 




QUAHOK 


A RATAKE 


C 


RELSE 


B 


RINGOLD 


8 


ROSAMOND 




QUANAH 


B RATHBUN 


C 


REHBERT 


D 


RINGWOOD 


8 


ROSANE 




QUANOAHL 


B RATLIFF 


B 


REHMIT 


A 


RIO 


D 


ROSANKY 




QUARLES 


RATON 


D 


REMSEN 


D 


RIO ARRIBA 


D 


ROSARIO 




QUARTZBUR6 


C RATTLER 


B 


REMUDAR 


8 


RIOCONCHD 


C 


ROSCOE 





QUATANA 


C RATTO 


D 


REMUNDA 


C 


RIO GRANDE 


B 


ROSCOMMON 


D 


QUAY 


B RAUB 


B 


RENBAC 


D 


RIO KING 


C 


ROSEBERRY 


B/D 


quazo 


D RAUVILLE 





RENCALSON 


C 


RIO LAJAS 


A 


ROSE BLOOM 





QUEALV 


RAUZI 


B 


RENCOT 


A 


RIO PIEORAS 


B 


ROSEBUD 


B 


QUE BRAD A 


C RAVALLI 


C 


RENFROW 


D 


RIPLEY 


B 


ROSEBURG 


B 


WEENY 


RAVENDALE 





RENICK 





RIPON 


8 


ROSE CREEK 


C 


QUEETS 


• RAVENNA 


c 


RENNIE 


C/O 


RIRIE 


B 


ROSEGLEN 


B 


QUEJUOO 


C RAYOLA 


B 


RENO 





RISBECK 


B 


ROSEHILL 





QUENZER 


RAHAH 


B 


RENOHILL 


c 


RISLEY 


D 


ROSELANO 


D 


QU1CKSELL 


RAWHIDE 


D 


RE NOVA 


D 


RISTA 


C 


ROSELLA 


D 


QUIETUS 


C RAHSON 


6 


RENOX 


6 


RISUE 


D 


ROSELMS 





QUIGLEY 


B RAY 


B 


RENSHAW 


B 


RITCHEV 


B 


ROSE MOUNT 




aUILCENE 


C RAVADO 


C 


RENSLOW 


B 


RITNRR 


C 


ROSENOALE 




QUILLAVUTE 


t RAYENOUF 


B 


RENSSELAER 


C 


RITO 


B 


ROSE VALLEY 




QUINSY 


• RAVHOMOVILLE 





RENT IDE 


c 


RITTER 


B 


ROSEVILLE 




QUINCY 


A RAVNE 


B 


RENT ON 


B/C 


RITTHAN 


C 


ROSE NORTH 




QUINLAN 


C RAVNESFORO 


B 


RENT SAC 


C 


RITZ 


B/D 


ROSHE SPRINGS 




QUINN 


RAYNHAM 


C 


REPARAOA 


D 


RITZCAL 


B 


ROSITAS 




QUINNEt 


C RAVNOR 


D 


REPP 


A 


RITZVILLE 


B 


ROSLYN 




OUINTON 


RAZOR 


C 


REP PART 


B 


RIVERHEAD 


B 


ROSNAN 




QUITMAN 


C RAZORT 


B 


REPUBLIC 


B 


RIVERSIDE 


A 


ROSNEY 




QUONSET 


4 READING 


C 


RESCUE 


C 


RIVER TON 


C 


ROSS 






READINCTON 


c 


RESERVE 


6 


RIVERVIEW 


8 


ROSS FORK 




RABER 


C READLYN 


B 


RESNER 


B 


RIVRA 


A 


ROSSI 




RAiEY 


A REAGAN 


B 


RET 


B/C 


RIXIE 


C 


ROSSNOYNE 




AABIOEUX 


B REAKOR 


B 


RETRIEVER 


D 


RIXON 


C 


ROSS VALLEY 




RABUN 


B REAL 


C 


RETSOF 


C 


RIZ 





ROTAN 




RACE 


D REAP 


D 


RETSOK 


B 


ROANOKE 


D 


ROTHIEMAY 




RACHERT 


REAROAN 


C 


REXBURG 


B 


ROBANA 


8 


ROTHSAV 




RACINE 


B REAVILLE 


C 


REXFORO 


C 


ROBBINS 


8 


ROTTULEE 




RACOON 


RE8A 


c 


REXOA 


A 


ROBBS 


D 


ROUBIDEAU 




RAO 


C REBEL 


B 


REYES 


C/D 


ROBERTS 


D 


ROUEN 




RA0ERSBUR6 


B REBUCK 




REYNOLDS 




ROBERTSDALE 


C 


ROUND BUTTE 




RAOfORO 


B RECAL 





REYNQSA 


B 


ROBERTSVILLE 


D 


ROUNOLEV 




RAOLEV 


C RECLUSE 


c 


REVWAT 





ROBIN 


B 


ROUNDTOP 




RADNOR 


REOBANK 


B 


RHAME 


B 


ROBINSON 


D 


ROUNDUP 




RAFAEL 


D RED BAY 


B 


RHEA 


B 


ROBINSONVILLE 


B 


ROUNDY 




RACER 


6 RED BLUFF 


C 


RHINEBECK 





ROBLEOO 


D 


ROUSSEAU 




RAGLAN 


C REO B4JTTE 


B 


RHOADES 


D 


ROB ROY 


C 


ROUTON 




RA6NAR 


B REDBY 


C 


RHOAME 


C 


ROSY 


C 


ROUTT 




RAGO 


C REOCHIEF 


C 


RIB 


c 


ROCA 


D 


ROVAL 




RA6S0ALE 


8/0 REDCLOUO 


B 


RICCO 





ROCHE 


C 


ROWE 




RA6T0HN 


D REDDICK 


C 


RICETON 


B 


ROCHE LLE 


c 


ROWENA 




RAHAL 


C REODIMG 





RICEVILLE 


c 


ROCHE PORT 


c 


ROWLAND 




RAHH 


C REDFIELO 


B 


RICHARDSON 


B 


ROCKAWAY 


c 


ROWLEY 




RAIL 


C/O RED MILL 


C 


RICHEAU 


C 


ROCKCASTLE 


D 


ROXAL 




RAINBOW 


C RED HOOK 


C 


RICHEY 


c 


ROCK CREEK 


D 


ROXBURY 




RAINEV 


B REDLAKE 


D 


RICHFIELD 


c 


ROCKFORD 


8 


ROY 




RAINS 


B/0 REDLANDS 


B 


RICHFORO 


A 


ROCKHOUSE 


A 


ROVAL 




RAINSBORO 


C REDLODGE 


D 


RICHLIE 


A 


ROCKINGHAM 


C/D 


ROYALTON 




RAKE 


REDMANSON 


B 


RICHHONO 





ROCKLIN 


C/O 


ROYCE 




RALSEN 


B/C REDMOND 


C 


RICHTER 


B 


ROCKLY 


D 


ROVSTONE 




RAMAOA 


C REDNUN 


C 


RICHVALE 


B 


ROCKPORT 


C 


ROZA 




RAMADERO 


B REDOLA 


B 


RICHVIEW 


c 


ROCK RIVER 


B 


ROZELLVILLE 




RAMBLER 


B REDONA 


B 


RICHWOOO 


B 


ROCKTON 


B 


ROZETTA 




RAMELLI 


C REDRIDGE 


B 


AICKHORE 


C 


ROCKWELL 


B 


ROZLEE 




RAMIRES 


REDROB 


D 


RICKS 


A 


ROCKWOOO 


8 


RUARK 




RAHMEL 


C RED ROCK 


B 


RICO 


C 


ROCKY FORO 


8 


RUBICON 




RAW 


C RED SPUR 


B 


RICHEST 


B 


RODDY 




RUBIO 




RAMONA 


B REDSTOE 


B 


RIDD 


C 


RODMAN 


A 


RUBY 




RAMPART 


B REDTHAYNE 


B 


RIDGEBURY 


C 


ROE 


8 


RUBVMLL 




RAHPARTAR 


A RED TOM 


C 


RIDGECREST 


c 


ROEBUCK 


D 


RUCH 




RAMPARTER 


A REDVALE 


C 


RIDGED ALE 


B 


ROELLEN 


D 


RUCKLES 




RAMSEY 


REDVIEH 


C 


RIDGELAND 





ROEMER 


C 


RUCLICK 




RAMSHORN 


B REE 


B 


RIDGE LAWN 


A 


ROESIGER 


8 


RUDD 




RANCE 


C AEEBEX 


C 


RIOGELV 


B 


ROGER T 


D 


RUDEEN 




RANCHER I A 


B REED 


D 


RIOGEVILLE 


B 


ROHNERVILLE 


8 


RUDOLPH 




RANO 


B REEOER 


B 


RIDGEWAY 





ROHRERSVILLE 


C 


RUDYARD 




RANOAOO 


C REEOPOINT 


C 


RIDIT 


c 


ROIC 





RUELLA 




RANDALL 


D REEDY 





RIET BROCK 


c 


ROKEBV 


D 


RUGGLES 




NOTES A BLANK HYDR0L06IC 


SOIL 


GROUP INDICATES THE SOIL GROUP HAS NOT 


BEEN 


DETERMINED 






TWO SOIL GROUPS SUCH AS 


B/C 


INDICATES THE 


DRAINED/UNDRAINEO SITUATION 







NEH Notice U-102 , August 1972 



139 



Table A3, (continued). 



RUIOOSO 


C 


SALVISA 


C 


SAUK 


B 


SEDAN 




SHELBY 


B 


RUKO 


D 


SALZER 





SAULICH 


D 


SEOILLO 


B 


SHELBYVILLE 


B 


RULE 


B 


SAHBA 


D 


SAUM 


C 


SECNELL 


C 


SHELDON 




RULICK 


C 


SAMISH 


C/D 


SAUNDERS 


C 


SEEDSKADEE 





SHELIKOF 


D 


4UM80 


C 


SAMNANISH 


C 


SAUVIE 


C/D 


SEES 


c 


SHELLABARGER 


B 


RUNFORD 


8 


SAHPSEL 


D 


SAUVOLA 


C 


SEEWEE 


B 


SHELLDRAKE 


A 


RUHNEV 


C 


SAMPSON 


B 


SAVAGE 


C 


SEGAL 


D 


SHELLROCK 


A 


RUMPLE 


C 


SANSIL 


D 


SAVANNAH 


;c 


SEGNO 


c 


SHELMADINE 





RUN RIVER 


C 


SAN ANDREAS 


C 


SAVENAC 


c 


SEHORN 


D 


SHELOCTA 


8 


RUNE 


C 


SAN ANTON 


B 


SAVO 


c 


SEITZ 


C 


SHELTON 


C 


RUNGE 


B 


SAN ANTONIO 


C 


SAVOIA 


8 


SEJITA 


D 


SHENA 


C 


RUNNELLS 


C 


SAN ARCACIO 


B 


SAWABE 





SEKIL 


C 


SHENANDOAH 


c 


RUNNVMEDE 


B 


SAN BENITO 


6 


SAMATCH 


c 


SEKIU 


D 


SHEP 


B 


RUPERT 


A 


SANCHEZ 





SAWCREEK 


8 


SELAH 


C 


SHEPPARD 


A 


RUSCO 


C 


SANDALL 


C 


SAWMILL 


C 


SELDEN 


C 


SHERANDO 


A 


RUSE 





SANDERSON 


B 


SAWYER 


C 


SELEGNA 





SHERAR 


c 


RUSH 


c 


SANDLAKE 


C 


SAX8V 


D 


SELFRIOGE 


C 


SHERBURNE 


B 


RUSHTOMN 


A 


SANDLEE 


A 


SAXON 


B 


SELKIRK 


D 


SHERIDAN 


B 


RUSHVILLE 


D 


SANELI 





SAYBROOK 


B 


SELLE 


B 


SHERLOCK 


B 


RUSS 


8 


SAN EMIGDIO 


B 


SAVLESVILLE 


C 


SELLERS 


A/D 


SHERM 





RUSSELL 


B 


SANFORO 


A 


SAVLOR 


A 


SELNA 


B 


SHERRYL 


B 


RUSSELLVILLE 


C 


SANGER 


8 


SCALA 


B 


SEMIAHMOO 


D 


SHERWOOD 


B 


RUSSLER 


c 


SAN GERMAN 





SCAMNAN 


C 


SEMIHMOO 


D 


SHIBLE 


B 


RUSTON 


a 


SANGO 


C 


SCANOIA 


B 


SEMINARIO 





SHIELDS 


c 


RUTLAND 


c 


SANGREY 


A 


SCANTIC 


C 


SEMIX 


C 


SHIFFER 


B 


RUTLEGE 


D 


SANILAC 


C 


SCAR 


A 


SEN 


B 


SHI LOH 


c 


RYAN 


D 


SAN ISABEL 


8 


SCARBORO 





SENECAVILLE 


C 


SHINAKU 


D 


RYAN PARK 


B 


SAN JOAQUIN 


D 


SCAVE 


c 


SEQUATCHIE 


B 


SHINGLE 


D 


RYOE 


B/D 


SAN JON 


C 


SCHAFFENAKEt 


A 


SEQUIN 


A 


SHINGLETOWN 


c 


RYOER 


c 


SAN JOSE 


B 


SCHAMBER 


A 


SEQUIN 


B 


SHINN 


B 


RYEGATE 


B 


SAN JUAN 


A 


SCHAMP 


C 


SEQUOIA 


C 


SHINROCK 


C 


RVELL 


A 


SAN LUIS 


B 


SCHAPVILLE 


C 


SERENE 





SHI OC TON 


a 


RYEPATCH 





SAN MATEO 


B 


SCHEBLV 





SERNA 


D 


SHIPLEY 


c 


RYER 


c 


SAN MIGUEL 


C 


SCHERRARD 


D 


SEROCO 


A 


SHIPROCK 


B 


RYORP 


c 


SANPETE 


B 


SCHLEY 


B 


SERPA 


C/D 


SHIRAT 


a 


RYUS 


c 


SANPITCH 


C 


SCHMUT I 


8 


SERVO SS. 


D 


SHIRK 


c 






SAN POIL 


B 


SCHNEBLY 


D 


SESAME 


C 


SHOALS 


c 


SABANA 


D 


SAN SABA 





SCHNEIDER 


C 


SESPE 


c 


SHOEBAR 


a 


SABANA SECA 





SAN SEBASTIAN 


8 


SCHNOORSON 


B/D 


SESSIONS 


c 


SHOEFFLER 


B 


SABENYO 


B 


SANTA 


C 


SCHNORBUSH 


C 


SESSUM 


D 


SHONKIN 


D 


SAB1NA 


c 


SANTA CLARA 


C 


SCHODACK 




SETTERS 


c 


SHOOFLIN 


C 


SABINE 


A 


SANTA FE 





SCHOOSON 


C 


SETTLE* EVER 


D 


SHOOK 


A 


SABLE 


D 


SANTA ISABEL 


D 


SCHOFIELD 


8 


SEVAL 


D 


SHOREWOOD 


c 


SAC 


B 


SANTA LUCIA 


C 


SCHOHARIE 


C 


SEVERN 


B 


SHOREY 


a 


SACO 





SANTA MARTA 


c 


SCHOLLE 


8 


SEVILLE 


D 


SHORN 


a 


SACRANENTO 


C/D 


SANTANA 


c 


SCHOOLEY 


C/O 


SEVV 


C 


SHORT CREEK 





SACUL 


D 


SANTAQUIN 


A 


SCHOONER 


D 


SEWARD 


B 


SHOSHONE 


D 


SADDLE 


B 


SANTA YNEZ 


c 


SCHRAOER 


D 


SEWELL 


B 


SHOTWELL 


D 


SADDLEBACK 


B / 


SANTEE 





SCHRAP 


D 


SEXTON 





SHOUNS 


a 


SADER 


D ' 


SANTIAGO 


8 


SCHRIER 


B 


SEYMOUR 


c 


SHOWALTER 


c 


SADIE 


B 


SANTIAH 


c 


SCHROCK 


B 


SHAAK 


D 


SHOWLOM 


c 


SAOLER 


C 


SAN TIMOTEO 


c 


SCHUMACHER 


B 


SHAOELAND 


c 


SHREWSBURY 





SAFFELL 


B 


SANTONI 


D 


SCHUYLKILL 


8 


SHAFFER 


A 


SHRINE 


a 


SAGANING 


D 


SANTOS 


c 


SCIO 


B 


SHAKAN 


B 


SHROE 





SAGE 





SANTO TOMAS 


B 


SCIOTOVILLE 


C 


SHAKESPEARE 


c 


SHROUTS 





SAGEHILL 


B 


SAN Y510R0 





SCISM 


B 


SHAKOPEE 


c 


SHUBUTA 


c 


SAGE MOOR 


C 


SAP I NERO 


B 


SCITUATE 


C 


SHALCAR 


D 


SHULE 


a 


SAGERTON 


C 


SAPP 





SCOBEY 


C 


SHALET 





SHULLSBURG 


c 


SAGINAW 




SAPPHIRE 


B 


SCOOTENEV 


B 


SHAM 


D 


SHUNWAV 


D 


SAGO 


D 


SAPPHO 


8 


SCORUP 


C 


SHAMBO 


B 


SHUPERT 


C 


SAGOUSPE 


C 


SAPPINGTON 


B 


SCOTT 


D 


SHAMEL 


B 


SHUWAH 


a 


SAGUACHE 


A 


SARA 


c 


SCOTT LAKE 


B 


SHANAHAN 


B 


SI 


a 


SAHALIE 


B 


SARALBGUI 


B 


SCOUT 


B 


SHAN DON 




SIBLEVVILLE 


B 


SAINT HELENS 


A 


SARANAC 


D 


SCOWLALE 


C 


SHANE 


D 


SIBYLEE 


D 


SAINT MARTIN 


C 


SARAPH 





SCRANTON 


B/D 


SHANO 


B 


SICILY 


B 


SAL ADO 


B 


SARATOGA 


B 


SCRAVO 


A 


SHANTA 


B 


SICKLESTEETS 


C 


SALADON 





SARATON 


B 


SCRIBA 


C 


SHAPLEIGH 


C/D 


SIDELL 


a 


SALAL 


B 


SARBEN 


A 


SCRIVER 


B 


SHARATIN 


B 


SIEANCIA 


a 


SALANATOF 


D 


SARCO 


B 


SCROGGIN 


C 


SHARKEY 


D 


SIEBER 


A 


SALAS 


C 


SARDINIA 


c 


SCULL IN 


C 


SHARON 


B 


SIELO 


c 


SALCHAKET 


B 


SARDO 


B 


SEA6ROOK 


c 


SHARP SBURG 


B 


SIEROCLIFF 





SALEM 


B 


SARGEANT 


D 


SEAMAN 


c 


SHARROTT 





SIERRA 


a 


SALENSBURG 


B 


SARITA 


A 


SEAQUEST 


c 


SHARVANA 


c 


SIERRA VILLE 


a 


SALGA 


C 


SARKAR 


D 


SEARCHLIGHT 


c 


SHASKIT 


B/C 


SIESTA 


D 


SAL IDA 


A 


SARPY 


A 


SEARING 


B 


SHASTA 


A 


SIFTON 


a 


SALINAS 


C 


SARTELL 


A 


SEARLA 


B 


SHAVANO 


B 


SIGNAL 


c 


SALISBURY 





SASKA 


8 


SEARLES 


c 


SHAVER 


B 


SIGURD 


a 


SAL IX 


B 


SASPAMCO 


8 


SEATON 


B 


SHAWA 


B 


SIKESTON 





SALKUM 


C 


SASSAFRAS 


B 


SEATTLE 


D 


SHAWANO 


A 


SILCOX 


a 


SALLISAM 


6 


SASSER 


8 


SEAWILLOW 


B 


SHAWMUT 


B 


SILENT 





SALLYANN 


C 


SATANKA 


c 


SEBAGO 





SHAY 


D 


SILER 


a 


SALMON 


B 


SATANTA 


8 


SEBASTIAN 





SHEAR 


C 


SILERTON 


a 


SALOL 


D 


SATELLITE 


C 


SEBASTOPOL 


c 


SHECKLER 


C 


SILI 





SALON IE 





SATT 





SEBEKA 


D 


SHED A 00 


B 


SILSTID 


A 


SALREE 


C/D 


SATTLEY 


8 


SEBEWA 


B/D 


SHEDD 


C 


SILVER 


C 


SALTAIR 





SATTRE 


8 


SEBREE 





SHEEGE 


D 


SILVERADO 


c 


SALT CHUCK 


A 


SATURN 


B 


SEBRING 


D 


SHEEP CREEK 


C 


SILVERBOW 


D 


SALTER 


8 


SAT US 


B 


SEBUD 


B 


SHEEPHEAO 


c 


SILVER CREEK 


D 


SALTERY 





SAUCIER 


8 


SECATA 


C/D 


SHEEP ROCK 


A 


SILVER TON 


C 


SALT LAKt 


D 


SAUDE 


8 


SECCA 


C 


SHEET IRON 


B 


SILVIEf 





SALUDA 


C 


SAUGATUCK 


C 


SECRET 


C 


SHEFFIELO 


D 


SINAS 


c 


SALUVIA 




SAUGUS 


B 


SECRET CREEK 


B 


SHELBURNE 


C 


SIHCOE 


c 


NOTES A 


BLANK HYOROLOGIC 


SOIL 


GROUP INDICATES 


THE SOIL GROUP HAS NOT 


BEEN 


DETERMINED 






TWO SOIL GROUPS SUCH AS 


B/C 


INDICATES THE ORAINED/UNDRAINEO SITUATION 







NEH Notice U-102, August 1972 



140 



Table A3, (continued). 



SIMEON 


A 


SNOW 


B 


SQUALICUN 


B 


STISSING 


C 


SURGH 


B 


SIMHLER 





SNOWOEN 


C 


SQUAW 


B 


STIVERSVILLE 


B 


SURPRISE 


B 


SIMNQNT 


C 


SNOWLIN 


B 


SQUILLCHUCK 


B 


STOCKBRIOGE 


B 


SURRENCY 


B/D 


SINNER 


A 


SNOWVILLE 


D 


S QUI HER 


B 


STOCKLAND 


B 


SURVVA 


C 


SIMON 


C 


SNOWY 


A 


SQUIRES 


B 


STOCKPEN 


D 


SUSIE CREEK 


D 


SI NONA 





SOAKPAK 


B 


ST. ALBANS 


B 


STOCKTON 





SUSITNA 


B 


SINOTE 


c 


SOAP LAKE 


B 


ST. CHARLES 


B 


STODICK 


D 


SUSQUEHANNA 





SIMPERS 


B 


SOBOBA 


A 


ST. CLAIR 


D 


STOKES 


D 


SUTHER 


C 


SIMPSON 


c 


SOBRANTE 


C 


ST. ELNO 


A 


STOHAR 


C 


SUTHERLIN 


( 


SIMS 





SOOA LAKE 


B 


ST. GEORGE 


C 


STONE R 


B 


SUTLEN 


B/C 


SINAI 


c 


SOOHOUSE 


D 


ST. HELENS 


A 


STONEWALL 


A 


SUTPHEN 





SINCLAIR 


c 


iODUS 


C 


ST. IGNACE 


C 


STONO 


B/D 


SUTTLER 


B 


SINE 


C 


SOELBERG 


B 


ST. JOE 


B/D 


STONVFORO 


D 


SUTTON 


B 


SINGLETREE 


C 


SOFIA 


B 


ST. JOHNS 


B/D 


STOOKEY 


B 


SVEA 


B 


SINGSAAS 


B 


SOGN 


D 


ST. LUCIE 


A 


STORDEN 


B 


SVERDRUP 


B 


SINN1GAM 


C 


SOGZIE 


B 


ST. MARTIN 


C 


STORLA 


B 


SVOLD 


C 


SINOMAX 


B 


SOKOLOF 


6 


ST. HARYS 


B 


STORNITT 


B 


SWAGER 


C 


SINTON 


B 


SOLANO 





ST. NICHOLAS 


D 


STORM KING 


D 


SWAKANE 


c 


SINUK 





SOLOATNA 


B 


ST. PAUL 


B 


STORY 


C 


SWAN 


C 


SION 


B 


SOLDIER 


C 


ST. THOHAS 





STOSSEL 


c 


SWANBOY 


D 


SIOUX 


A 


SOL OUC 


B 


STAATSBURG 




STOUGH 


c 


SWANNER 





SIPPLE 


A 


SOLOUC 


B 


STABLER 


B 


STOWELL 


D 


SHANSON 


B 


SIRI 


B 


SOLLEKS 


C 


STACY 


B 


STOY 


C 


SWANTON 


B/D 


SISKIYOU 


B 


SOLLER 


D 


STADY 


B 


STRAIGHT 


c 


SWANTONN 


C 


SISSETON 


8 


SOLOMON 





STAFFORD 


C 


STRAIN 


B 


SWAPPS 


C 


SISSON 


B 


SOLONA 


B 


STAGECOACH 


B 


STRASBURG 


c 


SWARTSNOOD 


C 


SITES 


C 


SOMBRERO 


D 


STAHL 


C 


STRATFORD 


B 


SWARTZ 


D 


SITKA 


B 


SOMERS 


B 


STALEY 


C 


STRAUSS 


C 


SWASEY 





SIXMILE 


B 


SONERSET 


D 


STAMBAUGH 


B 


STRAW 


B 


SWASTIKA 


C 


SIZEMORE 


B 


SOMERVELL 


B 


STANFORD 


D 


STRAWN 


B 


SWATARA 


A 


SIZER 


B 


SON SEN 


C 


STAMPEDE 


D 


STREATOR 


C 


SWAUK 


C 


SKAGGS 


B 


SONOI TA 


B 


STAN 


B 


STROLE 


B 


SWAWILLIA 


A 


SKAGIT 


6/Z 


SONOMA 





STAND I SH 


C/D 


STRONGHURST 


B 


SWEATHAN 


C 


SKAHA 


A 


SON TAG 





STANEY 


D 


STRONTIA 


B 


SWEDE 


B 


SKALAN 


C 


SOPER 


B/C 


STANFIELD 


C 


STROUPE 


C 


SWEDEN 


B 


SKAMANIA 


B 


SOQUEL 


B 


STANLEY 


C 


STRYKER 


B 


SWEEN 


C 


SKAMOKAMA 


B 


SOROO 


C 


STANSBURY 





STUB6S 


C 


SWEENEY 


B 


SKANEE 


C 


SORF 


C 


STANTON 


D 


STUCKCREEK 


B 


SWEET 


C 


SKELLOCK 


B 


SORRENTO 


B 


STAPLE TON 


B 


STUKEL 


D 


SWEETGRASS 


B 


SKERRY 


C 


SORTER 


B/D 


STARBUCK 


D 


STUKEY 


B 


SWEETWATER 





SKIONORE 


B 


SOS A 


C 


STARGO 


B 


STUMBLE 


A 


SWENODA 


B 


SKILLET 


C 


SOT ELLA 


C 


STARICHKOF 


D 


STUHPP 


D 


SWIFTCREEK 


B 


SKINNER 


C 


SOT IN 


B 


STARKS 


C 


STUHP SPRINGS 


B 


SWIFTON 


A 


SKI YOU 


c 


SOUTHFORK 





STARLEY 


D 


STUNNER 


B 


SHINS 


A 


SKOKOMISH 


B/C 


SOUTHGATE 


D 


STARR 


B 


STUTTGART 


D 


SWINGLER 


C 


SKOOKOMCHUCK 


B 


SOUTHWICK 


C 


STASER 


B 


STUTZMAN 


C 


SWINK 


D 


SKOHHEGAN 


B 


SPAA 





STATE 


B 


STUTZVILLE 


B/C 


SWISBOB 





SKULL CREEK 





SPACE CITY 


A 


STAT EN 


D 


SUBLETTE 


B 


SWITCHBACK 


C 


SKUMPAH 





SPADE 


B 


STATLER 


B 


SUDBURY 


B 


SWITZERLAND 


B 


SKUTUM 


C 


SPALDING 


D 


STAVE 


D 


SUDDUTH 


C 


SWOPE 


C 


SKYBERG 


C 


SPAN 


D 


STAVTON 





SUFFIELD 


c 


SWYGERT 


C 


SKYHAVEN 





SP ANA WAY 


6 


STEAMBOAT 





SUGAR LOAF 


B 


SVCANORE 


B/C 


SKVKOMISH 


B 


SPANEL 


D 


STEARNS 





SUISUN 


D 


SVCAN 


A 


SKYLICK 


C 


SPARTA 


A 


STECUM 


A 


SULA 


B 


SVLACAUGA 


B/D 


SKYLINE 





SPEARF1SH 


B 


STEED 


A 


SULLY 


B 


SYLVAN 


B 


SKYWAY 


B 


SPEARNAN 


C 


STEEDNAN 


D 


SULPHURA 


D 


SYNE R TON 


B 


SLAB 





SPEAKVILLE 


C 


STEEKEE 


C 


SULTAN 


B 


SYNAREP 


B 


SLATE CREEK 


C 


SPECK 


D 


STEELE 


B 


SUNAS 


B/C 


SYRACUSE 


B 


SLAUGHTER 


C 


SPECTER 





STEESE 


C 


SUMDUM 


D 


SYRENE 





SLAVEN 





SPEELYAI 


c 


STEFF 


c 


SUNNA 


B 


SVRETT 


C 


SLAHSON 


B 


SPEIGLE 


6 


STEGALL 


c 


SUHNERFIELD 


C 






SLAYTON 


D 


SPENARD 





STEIGER 


A 


SUMMERS 


B 


TABERNASH 


B 


SLEETH 


C 


SPENCER 


B 


STE1NAUER 


B 


SUMMERVILLE 


C 


TABIONA 


B 


SLETTEN 





SPENLO 


B 


STEINBECK 


B 


SUMMIT 


C 


TABLE MOUNTAIN 


B 


SLICKROCK 


6 


SPERRV 


c 


STEINMETZ 





SUMHITVILLE 


B 


TABLER 


D 


SLIGHTS 





SPICER 


c 


STEINS BURG 


C 


SUMTER 


C 


TABOR 


D 


SLIGO 


B 


SPILLWLLE 


B 


STEIWER 


C 


SUN 


D 


TACAN 


B 


SLIKOK 





SPINKS 


A 


STELLAR 


c 


SUNBURST 


C 


TACOHA 





SLIP 


B 


SPIRES 





STEHILT 


c 


SUNBURY 


B 


TACQOSH 





SL I PHAN 


B/C 


SPIRIT 


B 


STENDAL 


c 


SUNCOOK 


A 


TAFT 


C 


SLOAN 





SPIRO 


B 


STEPHEN 


c 


SUND 


C 


TAGGERT 


C 


SLOCUM 


B 


SPLENDORA 


C 


STEPHENSBURG 


B 


SUNDELL 


c 


TAHOHA 


B 


SLOOUC 


C 


SPLITRO 


D 


STEPHENVILLE 


B 


SUNDERLAND 


C/D 


TAHQUAHENON 





SLOSS 


C 


SPOFFORD 


C 


STERLING 


B 


SUNDOWN 


B 


TAHQUATS 


C 


SLUICE 


B 


SPOKANE 


6 


STERLINGTON 


B 


SUNFiaO 


B 


TAINTOR 


C 


SMARTS 


a 


SPONSELLER 


B 


STETSON 


6 


SUNNILANO 


C 


TAJO 


C 


SMITH CREEK 


A 


SPOON BUTTE 


C 


STETTER 





SUNNY HAY 


D 


TAKEUCHI 


c 


SMITHOALE 


B 


SPOONER 


C 


STEUBEN 


B 


SUNNY SIDE 


B 


TAKILMA 


B 


SMITHNcCK 


B 


SPOTTSWOOU 


B 


STEVENS 


6 


SUNNYVALE 


C 


TAKOTNA 


B 


SMITHTON 





SPRAGUE 


B/C 


STEVENSON 


B 


SUNRAY 


B 


TALAG 





S NOLAN 


C 


SPRECKELS 


C 


STEWART 


D 


SUNRISE 


D 


TALANTE 


C 


SHOOT 





SPRING 


C/D 


STICKNEY 


C 


SUNSET 


B 


TALAPUS 


B 


SNAG 


6 


SPRING CREEK 


C 


STIDHAN 


A 


SUNSHINE 


C 


TALBOTT 


C 


SNAHOPISH 


B 


SPRINGDALE 


B 


STIGLER 


C 


SUNSWEET 


C 


TALCOT 


c 


SNAKE 


C 


SPRINGER 


B 


STILLNAN 


A 


SUNUP 


D 


TALIHINA 





SNAKE HULLUM 


B 


SPRINGERVILLE 


D 


STILLWATER 


D 


SUPAN 


B 


TALKEETNA 


c 


SNAKELUN 


B 


SPRINGFIELD 





STILSON 


B 


SUPER IOR 


C 


TALLAC 


B 


SNEAU 





SPRINGNEYER 


C 


STIMSON 


B/C 


SUPERSTITION 


A 


TALLADEGA 


c 


SNELL 


C 


SPRINGTOWN 


C 


STINGAL 


B 


SUPERVISOR 


C 


TALLAPOOSA 


C 


SMELLING 


B 


SPROUL 


D 


STINSON 


C 


SUPPLEE 


B 


TALLEYVILLE 


B 


SNOHOMISH 





SPUR 


B 


STIRK 


D 


SUR 


B 


TALLS 


B 


SNOQUALHIt 


B 


SPURLOCK 


B 


ST1RUM 


B 


SURGEM 


C 


TALLULA 


B 


NOTES 


A 


BLANK HYOROLOGIC 


SOIL 


GROUP INDICATES 


THE SOIL GROUP HAS'NOT 


BEEN 


DETERMINED 




TMO SOIL GROUPS SUCH AS 


B/C 


INDICATES THE ORAINED/UNDRAINED SITUATION 







NEH Notice U-102, August 1972 



141 



Table A3, (continued) 



TAlLf 


B 


TENINO 


B 


TIGERON 


A 


TOMERA 


D 


TRENTON 


D 


TALNAGE 


A 


TENNO 





TfGIMON 


B 


TOMICHI 


A 


TREP 


B 


TALNO 


B 


TENORIO 


B 


TIGRET1 




TOMOKA 


A/0 


TRES HERMANOS 


B 


TALOKA 





TENOT 


C 


TIGUA 


D 


TONASKET 


B 


TRETTEN 


C 


TALPA 





TENRAG 


6 


TIJERAS 


B 


TONATA 


C 


TREVINO 


D 


TANA 


B 


TENSAS 


D 


TILFORO 


B 


TON AM AN DA 


C 


TREXLER 


C 


TAMA HA 


C 


TENSED 


C 


TILLED*. 


8 


TONEV 


D 


TRIANI 


c 


TAHALCO 





TENSLGEF 


B 


TILLICUM 


8 


TONGUE RIVER 


C 


TRIASSIC 




TANBA 


c/c 


TEOCULLI 


B 


TILLMAN 


C 


TONINI 


8 


TRICON 


c 


TAMELY 




TEPEE 


D 


TILNA 


C 


TONKA 


C 


TRIDELL 


8 


TAMMANY CREEK 


B 


TEPETE 


B/D 


TILSIT 


c 


TONKEV 





TRIDENT 





TAMMANY RIDGE 


B 


TERBIES 


C 


TILTON 


B 


TONKIN 


C 


TRIGO 


c 


TANNS 


C 


TERESA 


c 


TINBERG 


c 


TONKS 


B/D 


TRIMBLE 


8 


TAMP ICO 


B 


.'ERINO 





TIH8ERLV 


B 


TONOPAH 


B 


TRIMMER 


B 


TANAHA 





TERMINAL 





TIMBLIN 


D 


TONOR 


C 


TRINCHERA 


c 


TAN AN A 





TERMO 


c 


TIMENTN* 


B 


TONOHEK 


B 


TRINITY 





TANBERG 





TEROUGE 





TIHKEN 





TONRA 


A 


TRIOMAS 


B 


TANDY 




TERRA CE1A 


A/D 


TIMMERNAK 


B 


TONSINA 


B 


TRIPIT 


c 


TANEUH 




TERRA? 


D 


TIMMONS 


B 


TONUCO 


C 


TRIPLEN 


B 


TANEY 




TERRER* 


C 


TIHPAHUTE 





TOOLE 





TRIPOLI 


C 


TANGAIR 




TERRETON 


C 


TIMPANOGOS 


B 


TOOMES 


D 


TRIPP 


8 


TANNA 




TERRlt, 


a 


TIMPER 


D 


TOP 


z 


TRITON 


C 


TANNER 




TERRY 


e 


TIMPOONEKE 


B 


TOP I A 





TRIX 


B 


TANSEM 




TERNILLIGER 


c 


TIMULA 


B 


TOPPENISH 


B/C 


TROJAN 


B 


TANTALUS 




TESAJO 


A 


TINA 


C 


TOPTON 




TROMMALD 





TANMAX 




TE SCOTT 


C 


T I NO AH AY 


A 


TOQUERVILLE 


c 


TROMP 


C 


TAOP1 




TESUQUE 


B 


TINE 


A 


TOOUOP 


A 


TRONSEN 


C 


TAOS 




TETON 


A 


TINGEV 


B 


TORBOY 


6 


TROOK 


8 


TAPIA 




TETONIA 


B 


T1NSLEV 


A 


TORCHLIGHT 


C 


TROPAL 


D 


TAPPEN 




TETONKA 


C 


TINT ON 


A 


TOROIA 


D 


TROSI 





TARA 




TETOTUH 


c 


TINYTOWN 


B 


TORHUNTA 


C 


TROUP 


A 


TARKIO 




TEH 


B/D 


TIOCANO 


D 


TORNING 


8 


TROUT CREEK 


C 


TARKLIN 




TEX 


B 


TIOGA 


B 


TORODA 


8 


TROUTDALE 


8 


TARPO 




TEXLINE 


B 


TIPPAH 


C 


TORONTO 


C 


TROUT LAKE 


C 


TARRANT 




TEZUMA 


C 


TIPPECANOE 


B 


TORPEDO LAKE 





TROUT RIVER 


A 


TARRETE 




THACKERY 


8 


TIPPER 


A 


TORREON 


C 


TROUTVILLE 


B 


TARRVALL 




THADER 


C 


TIPPERARY 


A 


TORRES 


8 


TROXEL 


B 


TASCOSA 




THAGE 


C 


TIPPIPAH 





TORRINGTON 


B 


TROY 


C 


TASSEL 




THAN VON 


A 


TIPPO 


C 


TORRO 


C 


TRUCE 


C 


TATE 




THATCHER 


B 


TIPTON 


B 


TORS I DO 


D 


TRUCKEE 


C 


TATIVEE 




THATUNA 


C 


TIPTONVILLE 


B 


TORTUGAS 


D 


TRUCKTON 


B 


TATU 




THAYNE 


B 


TIRO 


C 


TOSTON 


D 


TRUE FISSURE 


A 


TATOM 




THEBES 


B 


TISBURY 


B 


TOTELAKE 


A 


TRUESDALE 


C 


TAUNTON 




THE BO 





TISCH 


C 


TOTEM 


B 


TRULL 


C 


TAVARES 




THEDALUND 


c 


TISH TANG 


B 


TOTTEN 


B 


TRULON 


B 


TANAS 


A/B 


THENAS 


c 


TITUSVILLE 


C 


TOUCH ET 


B 


TRUMAN 


8 


TAMCAU 




THEO 


C 


TIVERTON 


A 


TOUHEV 


B 


TRUMBULL 





TAYLOR 




. THERESA 
THERIOT 


6 


TIVOLI 


A 


TOULON 


B 


TRUMP 





TAYLOR CREEK 




D 


TIOT 


C 


TOURN 


C 


TRVON 


D 


TAVLORSFLAT 




THERMAL 


C 


TOA 


C 


TOURNQUIST 


B 


TSCHICOMA 


B 


TAYLORSVILLE 




THERMOPOLIS 





TOBICO 





TOURS 


B 


TUB 


C 


TAVSOH 




THESS 


6 


TOBIN 


B 


TOUTLE 


A 


TUBAC 


C 


TAZLINA 




THETFORO 


A 


TOBISH 


C 


TONER 


D 


TUCANNON 


C 


TEAL 




THIEL 


A 


TOBLER 


8 


TOMHEE 


D 


TUCKERMAN 


D 


TEAL SON 




THIOKOL 


C 


TOBOSA 


D 


TOWNER 


B 


TUCSON 


8 


TEALMHIT 




THOENV 





TOBY 


B 


TOMNL EY 


C 


TUCUNCARI 


B 


TEANAHAY 




THOMAS 


D 


TOCCOA 


8 


TOUNSBURY 


8 


TUFFIT 


D 


TCAPO 




THORNOALE 





TODD 


B 


TOUNSEND 


C 


TUGHILL 


D 


TEAS 




THORNDIKE 


C/O 


TODDLER 


8 


TOUSON 


8 


TUJUNGA 


A 


TEASOALE 




THORNOCK 


D 


TODDVI LLE 


e 


TOXAWAY 


D 


TUKEY 


C 


TEBO 




THORNTON 





TOE HEAD 


c 


TOY 


D 


TUKMILA 


D 


TECHICK 




THORN HOOD 




TOEJA 


C 


TOYAH 


8 


TULA 


C 


TECOLOTE 




THOROUGHFARE 




TOEM 


c 


TOZE 


8 


TULANA 


C/D 


TECUHSAH 




THORP 




TOGO 


B 


TRABUCO 


C 


TULARE 


C/D 


TEMOM 




THORR 




TOGUS 





TRACK 


B/C 


TULAROSA 


B 


TEEL 




THORREL 




TOHONA 


C 


TRACY 


B 


TULIA 


8 


TEHACHAPI 




THOH 




TOINE 


C 


TRAER 


C 


TULLAHASSEE 


C 


TEHAMA 




THREE MILE 




TOISNOT 





TRAIL 


A 


TULLER 


D 


TEJA 




THROCK 




TDIVABE 


c 


TRAIL CREEK 


B 


TULLOCK 


8 


TEJON 




THUNDERS UO 




TOKEEN 


B 


TRAM 


B 


TULLY 


C 


TEKOA 




THURBER 




TOKUL 


C 


TRANSYLVANIA 


B 


TULUKSAK 





TELA 




THURLONI 




TOLBY 


A 


TRAPPER 


A 


TUNBEZ 


D 


TELEFONO 




THURLOU 




TOLEDO 





TRAPPIST 


C 


TUNEY 





TELEPHONE 




THURMAN 




TOLICHA 





TRAPPS 


8 


TUHITAS 


8 


TELFER 




THURMONT 




TOLKE 


B 


TRASK 


C 


TUMUATER 


A 


TELFERNER 




THURSTON 




TOLL 


A 


TRAVELERS 


D 


TUNE HE AN 


D 


TEL IDA 




TIAGOS 




TOLLGATE 


B 


TRAVER 


B/C 


TUNICA 


D 


TELL 




TIAK 




TOLLHOUSE 


D 


TRAVESSILLA 





TUNIS 


D 


TELLER 




TIBAN 




TOLMAN 





TRAVIS 


C 


TUNITAS 


B 


TELL ICO 




TIBBITTS 




TOLNA 


8 


TRAHICK 


B 


TUNKHANNOCK 


A 


TILLMAN 




TICA 




TOLO 


B 


TRAY 


C 


TUNNEL 


B 


TELSTAO 




T1CE 




TOLSONA 


D 


TREADUAY 


D 


TUPELO 





TENESCAL 




TICHIGAN 




TOLSTOI 





TREASURE 


B 


TUPUKNUK 


D 


TEMPLE 


B/C 


TICHNOR 




TOLT 





TREBLOC 


D 


TUQUE 


B 


TEMV1K 




TICKAPOO 




TOLTEC 


C 


TREGO 


C 


TURBEVILLE 


C 


TEMABO 




T1CKASON 




TOLUCA 


6 


TRELONA 


D 


TURBOTVILLE 


C 


TEMAHA 




TIDMELL 




TOLVAR 


B 


TREMANT 


B 


TURBVFILL 


B 


THUS 




TIERRA 




TOMAH 


C 


TREMBLES 


8 


TURIN 


8 


TENCEE 




TIETON 




TOMAS 


B 


TREHPE 


A 


TURK 





TENERIFFE 




TIFFANY 




TOMAST 


C 


TREMPEALEAU 


B 


TURKEYSPRINGS 


C 


TENEX 




TIF TON 




TOME 


B 


TRENARY 


B 


TURLEV 


c 


TENIBAC 




TIGER CREEK 


B 


TOMEL 


D 


TRENT 


B 


TURLIN 


8 


NOTES 


A 


BLANK HYOROLOGIC 


SOIL 


GROUP INDICATES 


THE 


SOIL GROUP HAS NOT 


BEEN 


DETERMINED 




TWO SOIL GROUPS SUCH AS 


B/C INDICATES THE DRAINEO/UNDRAINED SITUATION 







NEH Notice U-102 , August 1972 



142 



Table A3, (continued). 



TUANBOM 


C 


USINE 


B 


VERDUN 


D 


HADOELL 


B 


WARDEN 




TURNER 


8 


USKA 


D 


VERGENNES 





WADDOUPS 


B 


WAROWELL 




TURNERVILLE 


B 


UTALIME 


B 


VERHALEN 





HADELL 


B 


WARE 




TURNEY 


B 


UTE 


C 


VERMEJO 





WADENA 


B 


WAREHAN 




TURRAH 


D 


UTICA 


A 


VERNAL 


B 


WADES BORO 


B 


WAR NAN 




TURRET 


B 


UTLEV 


B 


VERNAL IS 


B 


WADLEIGH 


D 


WARN SPRINGS 




TURRIA 


C 


UTUADO 


B 


VERNIA 


A 


WADHALAW 


D 


WARNERS 


A/0 


TURSON 


B/C 


UVAOA 


D 


VERNON 


D 


WADSWORTH 


C 


WARREN 




TUSCAN 





UVALOE 


C 


VERONA 


C 


WAGES 


B 


WARRENTON 


B/D 


TUSCARAWAS 


c 


UMALA 


B 


VESSER 


C 


WAGNER 


D 


WARRIOR 




TUSCARORA 


c 






VESTON 





WAGRAH 


A 


WARSAW 




TUSCOLA 


B 


VACHERIE 


C 


VETAL 


A 


WAHA 


C 


WARSING 




TUSCUHBIA 





VAOER 


B 


VETERAN 


B 


WAHEE 


D 


WARWICK 




TUSEL 


c 


VADO 


B 


VEVO 





WAHIAWA 


B 


WASATCH 




fUSKEEGO 


c 


VAIOEN 





VIA 


B 


WAHIKUL! 


B 


WASEPI 




TUSLER 


B 


VAILTON 


B 


VIAN 


B 


HAHKtENA 


B 


WASHBURN 




TUSQUITEE 


B 


VALBY 


C 


VIBORAS 





WAHKIACUS 


B 


WASHINGTON 




TUSTIN 


B 


VALCO 


c 


VIBORG 


B 


WAHLUKE 


B 


WASHOE 




TUSTUMENA 


B 


VALOEi 


B/C 


VICKERY 


C 


WAHHONIE 





WASHOUGAL 




TUTH1LL 


B 


VALE 


B 


VICKSBURG 


B 


NAWETON 


C 


WASHTENAW 


C/D 


TUTNI 


6 


VALENCIA 


B 


VICTOR 


A 


WAHTIGUP 


B 


WASILLA 




TUTMILER 


B 


VALENT 


A 


VICTORIA 





WAHTUN 


D 


WASIOJA 




TUXEDO 




VALENTINE 


A 


VICTORY 


B 


NAIAHA 





WASSAIC 




TUXEKAN 


B 


VALERA 


C 


VICU 





WAIAKOA 


C 


WATAB 




TMIN CREEK 


B 


VALKARIA 


B/O 


VIOA 


B 


WAIALEALE 





WATAUGA 




TMINING 


c 


VALLAN 





VIORINE 


C 


WAIALUA 


B 


WATCHAUG 




TH1SP 


B 


VALLECITOS 


C/D 


VIEJA 





WAIAWA 


D 


WATCHUNG 


D 


mo oot 


C 


VALLEONO 


B 


VIENNA 


6 


WAIHUNA 


D 


WATERBORO 




TVBO 





VALLERS 


C 


VIEQUES 


B 


WAIKALOA 


B 


WATERBURV 





TVEE 





VALNONT 


c 


VIEM 


C 


WAIKANE 


B 


WATERINO 




tvgart 





VALNY 


B 


VIGAR 


C 


WAIKAPU 


6 


WATERS 




tyler 


D 


VALOIS 


B 


VIGO 





WAIKOHO 


D 


WATKINS 




TVNOALL 


B/C 


VANER 





VIGUS 


c 


WAILUKU 


B 


WATKINS RIDGE 




TVNER 


A 


VANAJO 





VIKING 





WAIHEA 


B 


WATO 




TYRONE 


C 


VAN AND* 





VI L 


D 


WAINEE 


B 


WATOPA 




rrsoN 


C 


VAN BOREN 




VILAS 


A 


WAINOLA 


A 


WATROUS 








VANCE 


c 


VILLA GROVE 


B 


WAIPAHU 


C 


WATSEKA 




UANA 





VANDA 





VILLARS 


B 


WAISKA 


B 


WATSON 




UBAR 


c 


VANOALIA 


c 


VILLY 





WAITS 


B 


WATSONIA 




UBLV 


B 


VANOERDASSON 





VINA 


6 


WAKE 


D 


WATSONVILLE 




UCOLA 





VANOERGRIFT 


c 


VINCENNES 


C 


WAKEEN 


B 


WATT 




UCOLO 


C 


VANDERHOFF 





VINCENT 


C 


WAKEFIELD 


B 


WATTON 




UCOPIA 


B 


VANOERLIP 


A 


VINEYARO 


c 


WAKELAND 


B/D 


WAUBAY 




UOEL 


D 


VAN DUSEN 


B 


VINGO 


B 


WAKONOA 


C 


WAUBEEK 




UDOLPHO 


C 


VANET 





MINING 


C 


WAKULLA 


A 


WAUBONSIE 




UFFENS 





VANG 


B 


VINITA 


C 


WALCOTT 


B 


WAUCHULA 


BSD 


U6AK 





VANHORN 


B 


VINLANO 


C 


WALOECK 


C 


MAUCONA 




UHLANO 


B 


VAN NOSTERN 


B 


VINSAD 


c 


WALDO 


D 


WAUCONDA 




UHLIG 


B 


VANNOY 


6 


VINT 


B 


WALDRON 


D 


WAUKEE 




UINTA 


B 


VANOSS 


B 


VINTON 


B 


WALDROUP 





WAUKEGAN 




UK I AH 


C 


VANTAGE 


c 


VIRA 


C 


WALES 


B 


WAUKENA 




ULEN 


B 


VAN WAGONER 





VIRATON 


C 


WALFORO 


C 


NAUKON 




ULLOA 


B 


VARCO 


c 


VIRDEN 


c 


WALKE 


C 


MAUHBEK 




ULN 


B 


VARELUN 


c 


VIRGIL 


6 


WALL 


B 


4AURIKA 




ULRICHER 


B 


VAR1CK 





VIRGIN PEAK 


D 


WALLACE 


B 


WAUSEON 


B/D 


ULUPALAKUA 


6 


VAR1NA 


c 


VIRGIN RIVER 





WALLA WALLA 


B 


MAVERLV 


B/D 


ULV 


B 


VARNA 


c 


VIRTUE 


C 


WALLER 


B/D 


WAWAKA 




ULYSSES 


B 


VARRO 


B 


VISALIA 


6 


WALLINGTON 


C 


WAVCUP 




UNA 


A 


VARYSBURG 


B 


VISTA 


C 


WALL IS 


B 


MAVDEN 




UNAPINE 


B/C 


VASHTI 


C 


VIVES 


B 


NALLK ILL 


C/D 


WAVLAND 


C/0 


UN I AT 


D 


VASQUEZ 


6 


VIVI 


B 


WALLNAN 


C 


WAYNE 




UNIKOA 


B 


VASSALBORO 





VLASATV 


C 


WALLOWA 


C 


WAYNESBORO 




UNIL 


D 


VASSAR 


B 


VOCA 


C 


WALL PACK 


c 


MAVSIDE 




UNNAK 


B 


VASTIME 


C 


VOOERMAIER 


6 


WALLROCK 


a/c 


MEA 




UNPA 


B 


VAUCLUSE 


C 


VOLAOORA 


8 


WALLS BURG 





MEAVER 




UNPQUA 


B 


VAUGHNS V I LLE 


c 


VOLCO 





WALLSON 


B 


MEBB 




UNA 





VAVAS 





VOLENTE 


C 


WALPOLE 


C 


WEBER 




UNAOILLA 


B 


VEAL 


B 


VOLGA 





WALSH 


• 


MEBSTER 




UNANEEP 


B 


VEAZIE 


B 


VOL IN 


6 


WALSHVILLE 


D 


MEDEKIND 




UNCOH 


B 


VEBAR 


B 


VOLINIA 


B 


WALTERS 


A 


WEDEATZ 




UNC0HPAH6RE 





VECONT 





VOLKE 


C 


WALTON 


C 


WEDGE 




UNEEDA 


B 


VEGA 


c 


VOLKNAR 


B 


WALUH 


6 


WEDOWEE 




UN6ERS 


B 


VEGA ALTA 


c 


VOLNER 





WALVAN 


B 


WEED 




UNION 


C 


VEGA BAJA 


c 


VOLNEV 


B 


WAMBA 


B/C 


WEEDING 


A/C 


UNIONTOHN 


B 


VEKOL 





VOLPERIE 


C 


WAMIC 


B 


NEEONARK 




UNIONVILLE 


C 


VELOA 


B 


VOLTAIRE 





WANPSVILLE 


B 


WEEKSVILLE 


B/D 


UNISON 


C 


VELMA 


B 


VOLUSIA 


C 


WANATAH 


e 


WEEPON 




UPDIKE 





VELVA 


B 


VONA 


B 


WANBLEE 





WEHADKEE 




UPSAL 


c 


VENA 


c 


VORE 


B 


WANDO 


A 


WEIKERT 


C/D 


UPSATA 


A 


VENANGO 


c 


VROOMAN 


B 


WANETTA 


A 


WEINER 




UPSHUR 


C 


VENATOR 





VULCAN 


C 


MANILLA 


C 


WEINBACH 




UPTON 


c 


VENETA 


c 


WLACH 





MANN 


A 


WEIR 




URACCA 


B 


VENEZ1A 









MAPAL 


6 


WEIRNAN 




URbANA 


C 


VENICE 





HABANICA 





MAPATO 


C/D 


WEISER 




URBO 





VENLO 


D 


HABASH 


D 


WAPELLO 


B 


WEISHAUPT 




URICH 


D 


VENUS 


B 


NABASHA 


D 


WAPINITIA 


B 


WEISS 




IWNE 


B 


VERBOORT 


D 


NAB ASS A 


6/0 


MAPPING 


B 


WEITCHPEC 




URSINE 





VEfcDt 


c 


NABEK 


B 


MAPS IE 


B 


WELAKA 




URTAH 


c 


VEROEL 





HACA 


c 


MARBA 


B 


MELBV 




IWHIL 





VEROELLA 


D 


MAC OTA 


B 


HARD 


D 


MELCH 




USAL 


B 


VEROICO 





MACOUSTA 


C 


MARDBORO 


A 


WELD 




USHAR 


B 


VERDIGRIS 


B 


HAD A MS 


B 


WARDELL 


D 


WELDA 




NJTES 


A 


BLANK HVOROLOGIC 


SOIL 


GROUP INDICATES 


THE SOIL GROUP HAS NOT 


BEEN 


DETERNINED 




TWO SOIL GROUPS SUCH AS 


B/C 


INDICATES THE ORAINEO/UNORAINED SITUATI3W 







NEH Notice U-102, August 1972 



143 



Table A3, (continued). 



MELOON 





WICKIUP 


C 


WISNER 


D 


VALMER 


B ZUNDELL 


B/C 


HELDONA 


B 


WICKLIFFE 


D 


WIT6ECK 





YAMAC 


8 ZUNHALL 


a/r 


HELLER 


C 


WICKSBURG 


B 


MITCH 


D 


YAMHILL 


C ZUNI 





WELLINGTON 


D 


WIOTSOE 


C 


WITHAM 


D 


YANPA 


C ZURICH 


8 


WELLHAN 


B 


WIEHL 


C 


WITHEE 


C 


VAMSAV 


D ZMINGLE 





WELLNER 


8 


W1EN 


D 


WITT 


8 


VANA 


8 




MELLSBORO 


C 


WIGGLETON 


B 


HITZEL 





YANCY 


t 




HELLSTON 


B 


WIGTON 


A 


WODEN 


B 


VAROLEV 


C 




MELLSVILLE 


B 


WILBRAHAM 


C 


MODSKOM 


B/C 


YATES 


D 




MELRING 





WILBUR 


C 


WOLCOTTSBURG 




VAUCO 


C 




HEMPLE 


B 


WILCO 


c 


WOLDALE 


C/D 


YAWDIM 







NENAS 


B/C 


WILCOX 





WOLF 


B 


YAWKEV 


C 




HENATCHEE 


C 


WILCOXSON 


c 


WOLFESEN 


C 


VAXON 


8 




MENDEL 


B/C 


WILDCAT 


D 


WOLFESON 


C 


VEARV 


C 




HENHAN 




WILDER 


B 


MOLFORD 


B 


VEATES HOLLOW 


C 




WENONA 


C 


WILDERNESS 


C 


WOLF POINT 


D 


VBGEN 


8 




MENTHORTH 


B 


WILDROSE 





WOLFTEVER 


C 


YELM 


8 




WERLOW 


C 


WILDWOOD 





WOLVERINE 


A 


VENRAB 


A 




WERNER 


B 


WILEY 


c 


WOODBINE 


B 


YEOMAN 


8 




WE SO 


C 


WILKES 


c 


WOODBRIDGE 


C 


VESUM 


8 




WcSSEL 


B 


flLKESON 


c 


WOOD BURN 


C 


VETULL 


A 




WESTBROOK 


D 


WILKIMS 


D 


MOOD BURY 





VOOER 


8 




UEST8URV 


C 


WILL 


D 


WOODCOCK 


8 


VOKOHL 







WESTCREEK 


6 


WILLACY 


B 


MOODENVILLE 


C 


VOLLABOLLV 







WESTERVILLE 


C 


WILLAKENZIE 


c 


MOODGLEN 





YOLO 


8 




WESTFALL 


C 


WILLAHAR 


D 


WOODHALL 


8 


VOLOGO 







WESTFIELD 




WILLAMETTE 


B 


WOODHURST 


A 


VOMBA 


C 




HESTFORD 




WILLAPA 


c 


WOODINVILLE 


C/D 


VOMONT 


8 




WESTLAND 


B/D 


MILLARD 


B 


MOOOLY 


8 


VONCALLA 


C 




WESTMINSTER 


C/D 


HILLETTE 


A/O 


MOOOLYN 


C/D 


VONGES 







WESTHORE 


B 


MILLHAND 


B 


WOOOMANSIE 


8 


VONNA 


e/D 




WESTMORELAND 


B 


WILLIAMS 


B 


WOOOMERE 


a 


TORDY 


8 




WESTON 


D 


WILLIAMSBURG 


B 


MOOD RIVER 


D 


YORK 


C 




WESTPHALIA 


B 


WILLIAMSON 


c 


WOOD ROCK 


c 


YORK V ILL E 


D 




WESTPLAIN 


C 


WILLIS 


C 


WOODROW 


c 


YOST 


C 




WESTPORT 


A 


WILLITS 


B 


MOODS CROSS 





YOUGA 


8 




WeSTVILLE 


B 


WILLOOGHBV 


B 


MOODSFIELO 


c 


YOUMAN 


C 




WETHERSFIELD 


C 


WILLOW CREEK 


B 


MOODS IDE 


A 


VOUNGSTON 


8 




WETHEV 


B/C 


WILLOWDALE 


B 


WOODSON 





VOURAME 


A 




WETTERHORN 


C 


WILLOWS 


D 


WOODSTOCK 


C/D 


YOVIMPA 


D 




WETZEL 


D 


WILLMOOD 


A 


WOODSTOWN 


c 


VSIDORA 


D 




WEYMOUTH 


B 


MILMER 


C 


WOODWARD 


B 


VTURBIDE 


A 




WHAKANA 


B 


MIL PAR 


D 


WOOLMAN 


8 


YUBA 


D 




WHALAN 


B 


MILSON 





WOOL PER 


c 


VUKO 


C 




WHARTON 


C 


WILTSHIRE 


C 


WOOLSEV 


c 


YUKON 


D 




WHATCOM 


C 


WINANS 


B/C 


WOOSLEY 


c 


VUNES 


D 




WHATELY 


D 


WINBERRY 


D 


WOOSTER 


c 


YUNOUE 


C 




WHEATLEY 


/ 


WINCHESTER 


A 


WOOSTERN 


8 








WHEATRIDGE 


C 


WINCHUCK 


C 


WOOTEN 


A 


ZAAR 







WHEATVILLE 


B 


WINDER 


B/D 


WORCESTER 


8 


ZACA 


D 




WHEELER 


B 


WINDHAM 


B 


WORF 


D 


ZACHARIAS 






WHEELING 


6 


WINDMILL 


B 


WORK 


c 


&ACHARY 






WHEELON 





WINOOH 


B 


NORLAND 


8 


ZAFRA 






WHELCHEL 


B 


WIND RIVER 


B 


NOR LEY 


C 


ZAHILL 






WHETSTONE 


B 


WINDSOR 


A 


MORHSER 


c 


ZAHL 






WHIDBEV 


C 


MINDTHORST 


C 


WOROCK 


8 


ZALESKI 






WHIPPANY 


C 


MINDY 


C 


HORSHAM 





I ALL A 






WHIPSTOCK 


C 


MINEG 


z 


WORTH 


c 


ZAMORA 






WHIRLO 


B 


MINE MA 


C 


WORT HEN 


8 


ZANE 






WHIT 


a 


MINETTI 


B 


WORTHING 





ZANEIS 






WH I TAKER 


c 


MINFIELD 


C 


MORTHINGTON 


c 


ZANESVILLE 






WHITCONB 


c 


MING 


D 


HORTMAN 


c 


ZANONE 






WHITE BIRO 


c 


MINGATE 


B 


WRENTHAM 


c 


ZAPATA 






WH1TECAP 





WINGER 


C 


WRIGHT 


c 


ZAVALA 






WHITEFISH 


B 


MINGVILLE 


B/D 


MRIGHTMAN 


c 


ZAVCO 






WHITEFORO 


B 


WINIFRED 


C 


HRIGHTSVILLE 


D 


ZEB 






WHITEHORSE 


B 


WINK 


B 


WUNJEY 


B 


ZEES IX 






WHITE HOUSE 


c 


WINKEL 


D 


HURTSBORO 


C 


ZELL 






WHITELAKE 


B 


WINKLEMAN 


C 


HVALUSING 


D 


Z6N 






WHITELAW 


B 


WINKLER 


A 


HVARD 


8 


Z6NOA 






WHITEHAN 





WINLO 


D 


HVARNO 


• 


ZCNIA 






WHITEROCK 


D 


WINLOCK 


C 


HYATT 


C 


ZENIFF 






WHITESBURG 


c 


MINN 


C 


HVEAST 


C 


ZEONA 






WHITE STORE 





WINNEBAGO 


B 


HYEVILLE 


c 


ZIEGLER 






WHITE SWAN 


c 


HINNEMUCCA 


B 


HVGANT 


c 


CI6MEID 






WHITEWATER 


B 


WINNESHIEK 


B 


HYKOFF 


8 


ZILLAH 


B/C 




WHITEWOOD 


c 


MINNETT 


D 


HYMAN 


B 


ZIM 






WHITLEY 


8 


MI NONA 


D 


HYMORE 


C 


ZIMMERMAN 






HHITLOCK 


B 


MINOOSKJ 


8 


HYNN 


8 


ZING 






WHITMAN 





WINSTON 


A 


MY NOOSE 


D 


Z INZER 






WHITNEY 


B 


WINTERS 


C 


MVO 


8 


ZION 






WHITORE 


A 


NINTERSBUR6 


C 


HVOCENA 


8 


ZIPP 


C/0 




WHITSOL 


B 


WINTERSET 


C 






ZITA 






WHITSON 





WINTHROP 


A 


XAVIER 


8 


ZOAR 






WHITWELL 


c 


WINTONER 


C 






ZOATE 






WHOLAN 


c 


WINU 


C 


VACOLT 


8 


ZOHNER 


B/D 




WIBAUX 


c 


WINZ 


c 


YAHARA 


8 


ZOOK 






WICHITA 


c 


MIOTA 


B 


VAHOLA 


B 


ZORRAVISTA 






WICHUP 


D 


MI SHARD 


A 


VAKI 


D 


ZUFELT 


B/D 




WICKERSHAM 


B 


MISHEYLU 


C 


YAKIMA 


8 


ZUKAN 






W1CKETT 


C 


WISHKAH 


c 


YAKUS 


D 


ZUMBRO 






WICKHAM 


B 


MISKAH 


c 


VALLANI 


8 


ZUMMALT 






NOTES 


A 


BLANK HVOROLOGLC 


SOIL 


GROUP INDICATES 


THE SOIL GROUP HAS NOT 


BEEN DETERMINED 




TWO SOIL GROUPS SUCH AS 


B/C INDICATES THE DRAINEO/UNORAINEO SITUATION 





NEH Notice U-102, August 1972 



144 



Exhibit Al. Complete listing of Program XSRAIN. 



PROGRAM XSRAIN 73/73 OPT«0 TRACE FTN *. 8*508 80/10/01 

1 PROGRAM XSRaINUNPUT. OUTPUT. TAPES, TAPE6=0UTPUT> 

COMMON/ A/0ElT,Q,N,P,TD»CN 
COMMON/B/KT.TP.RP.WP.K 
COMMON/C/MO.DAY.SFFC.S 
5 COMMON/D/T<i00) .RtlOO) iRE(IOO) 

C0MM0N/E/AR(5) 
COMMON/F/SF 

C0MMON/G/CUhP(100) .OPTION 
COMMON/H/ARfA.L.Y.NN.NF 
10 COMMON/I/DElTa(150) 

COMMON/ J/DElP(150).QA( 150) »TM( 150) 
C0MM0N/K/SUR0PT2 
COMMON/L/LAGFLAG»TL 

INTEGER OPTl0N.Q,SUB0PTl,SUB0PT2.PFLAG.CFLAG.TFLAG 
15 REAL KT.L 

C 
C 

C THIS PROGRAM CAN COMPUTE EXCESS RAINFALL PATTERNS FOR FOUR CASES 
C - 8Y INFILTRATION EQUATIONS FOR VARIABLE AND CONSTANT RAINFALL' 
20 C -BY SCS METhOO FOR VARIABLE AND CONSTANT RAINFALL 

C FLOOD HYOROGRAPHS ARE COMPUTEO FOR ALL FOUR PATTERNS WITH 
C THE SCS OIMeNsIONLESS UNIT HYDROGRAPH' MASS CURVE 

c 

C MAIN OPTION 1 IMPOSES A HUFF TIME DISTRIBUTION ANO ASSUMES FIELD 
25 C CAPACITY SOIL MOISTURE (AMCII) 

C 

C MAIN OPTION 2 IMPOSES A HUFF TIME DISTRIBUTION AND ACCOUNTS FOR 
C SEASON AND FIVE DAY ANTECEDENT RAIN 
C 
30 C MAIN OPTION 3 READS IN A USER SPECIFIED RAINFALL DISTRIBUTION 

C AND ACCOUNTS FOR SEASON- AND FIVE DAY ANTECEDENT RAIN 
C 

C MAIN OPTION * READS IN A USER-SPECIFIED RAINFALL DISTRIBUTION 
C AND ASSUMES FIELD CAPACITY SOIL MOISTURE (AMCII) 
35 C 

C ALL FORTRAN SYMBOLS ARE DEFINED IN THE ACCOMPANYING USERS MANUAL 
READ(5.1)0PtI0N 
l FORMATU1) 

WRITE(6,14)oPTION 
♦0 14 F0RMAT(2X."mAIN OPTION CHOSEN IS". I*) 

HRITE(6,51) 
51 FORMAT(//,2x»"IF SUBOPT1 » It ONLY INFILTRATION APPROACH IS USED W 
!ITH VARIABLE RAINFALL RATES" 
|./.2X,»IF SuBOPTl = *. HYOROGRAPHS ARE DERIVED WITH FOUR DIFFERENT 

♦5 i means of Calculating excess rain",//,2x»"IF sjbopt2 » o. user inp 

IUTS KT ANO SFFC»«/.2X,»IF SUB0PT2 » 1. KT ANO SFFC ARE COMPUTED FR 
IOM CN».//> 
REA0(5.38)SuB0PTl.SUB0PT2 
38 F0RMAT(I2.2x»I2) 
50 C 

C IF SUBOPT1 s 1, EXCESS RAIN IS ONLY CALCULATED BY INFILTRATION 
C "EQUATIONS Fo« A VARIABLE PATTERN 

C IF SUBOPT1 B 4» EXCESS RAIN IS CALCULATED BY FOUR HETHODS 
C FOR PURPOSES OF COMPARISON: BY INFILTRATION APPROACH ANO 
55 C SCS METHOD FOR BOTH VARIABLE ANO CONSTANT RAIN 

C 
C IF SUB0PT2 a 0. THE USER INPUTS HYDPAUL'IC CONDUCTIVITY. <T.AND 



145 



Exhibit Al. (continued). 



PROGRAM XSRAIN 73/73 OPTeO TRACE FTN 4.8*506 80/10/( 

C STORAGE SUCTION FACTOR AT FIELD CAPACITY. SFFC. IF SUB0PT2=1, 
C THE PROGRAM CALLS SUBROUTINE TABLE TO COMPUTE KT AYD SFFC FROM 
60 C THE WATERSHED CURVE NUMBER. 

C 

WRITE (6,39) SUB0PT1.SU80PT2 

39 FORMAT!/. 2X, "SUB OPTION 1 «»,I3, 10X."SUB OPTION 2 *»,I3./) 
IF(SUB0PT2.eO.0)GO TO 40 

65 REA0(5.41)P, TD.CN 

41 FORMATC3F10.3) 
WRITE<6,42)p,TD,CN 

42 F0RMAT(2X,"sT0RM DEPTH P »",F10.3.2X,"IN".5X, "STORM DURATION TO ■•• 
|.F10.3.2X."hR".5X.»CURVE NUMBER CN «"»F10.3,/) 

70 CALL TABLE 

GO TO 43 

40 READ<5.2)KT,SfFC»P.TD,CN 

2 F0RMAT(5F10.3) 
WRITE(6.15)kT,SFFC»P.TD.CN 

75 15 FORMAT!/. 2X,"HY0RAULIC CONDUCTIVITY. KT e".F8.3, 1 X. "IN/HR"./. 

!2X, "STORAGE SUCTION FACTOR AT FIELD CAPACITY. SFFC »".F8.3. 

!1X, "IN", /.2x. "TOTAL PRECIP. P=".F8.3. 1 X,"IN»./,2x. 

!"OURATION TIME. TD =".F8,3.1X,"HR",/»2X, 

("CURVE NUMBER. CN *".F8.1,/) 
80 43 READ(5.54)LaGFLAG 

54 FORMAT (M) 
C 

C MEANING OF LAG TIME FLAG: 

C IF LAGFLAG=o. TL IS COMPUTED FROM CN.L. AND Y IN SUBROUTINE UH. 
85 C IF LAGFLAG=i.TL IS PROVIDED BY THE PROGRAM USER 

C 

WRITE16.55) 

55 FORMAT (/.2X, "IF LAGFLAG ■ 0. LAG TIMEi IS COMPUTED IN SUBROUTINE' UH 
!"./.2X."IF LAGFLAG a 1, LAG TIME IS PROVIDED BY THEl USER"./) 

90 WRITE(6,56)LAGFLAG 

56 FORMAT (2X. "LAGFLAG a". 13./) 
• IF(LAGFLAG.eQ.1)G0T0 57 

READ(5.27)AREA.L»V 

27 F0RMATOF10.2) 

95 WRITE(6,28)4REA,L.Y 

28 FORMAT(2X,"AREAn»,F10.2.2X,»SO MI", 
I/.5X. "LENGTH TO DI VIDEa".F10.2.2X, "FT».5X, 
|"AVG WATERSHED SLOPE =".F10. 2. 2X. "PERCENT") 

GO TO 58 
100 57 READ(5.59)ArEa.TL 

59 F0RMAT(2F10.2) 
WRITE(6,60) aREA.TL 

60 FORMAT(2X,"AREAn",F10.2.2X,"SO Ml", 
J/.5X,"USER PROVIDED LAG TIME »"»F8.3."HR",/) 

105 58 IF(0PTI0N.GT.2)G0 TO 3 

READIS.^IO.oELT 
4 F0RMAT(il,2x.Fl0.1) 
WRITE(6.16)fl.0ELT 
16 FORMAT (2X,"hUFF QUART ILE«"» 14. 5X , "T I ME STEP"". Fl 0. 1 . "MIN") 
110 IF(OPTION.Eo.l)GO TO 5 

3 IF(0PTION.Eo.4)G0 TO 8 
READ(5,6)M0,0AY 

6 F0RMATtI2,2x.I2) 
WRITE(6,17)m0,DAY 



146 



Exhibit Al. (continued). 



PROGRAM XSRAlN 73/73 OPT = TRACE FTN 4.8*508 80/11 

115" 17 F0RMAT<2X,"mOnTH= i, ,I4,5X,"0AY="»I4> 

READ(5t7) (AR(I), 1=1.5) 

7 FOSMAT(5F10.3) 
WRITE(6,S0> 

50 FORMAT(/.2X, "ARRAY OF ANTECEDENT RAINFALL' DEPTHS",/) 
120 DO 18 J=l,5 

WRITE(6,19) j.aRU) 

19 FORMAT<2X,"aR(",I2,")=".F10.3> 
18 CONTINUE 

IF(0PTI0N.EQ.2)60 TO 5 
12S C 

C IF PFLAG = 0» INPUT RAIN IS IN IN/HR 

C IF PFLAG = l»INPUT RAIN IS IN INCHES 

C 

C IF CFLAG = o» USER TIME DISTRIBUTION IS USED AS IS 

130 C IF CFLAG = l» CORPS OF ENGINEERS BALANCED HYETOGRAPH IS FORMED 

c from input Rainfall 
c 

C IF TFLAG = 0» TIME IS INPUT IN MINUTES 
C IF TFLAG = 1. TIME IS INPUT IN HOURS 
135 C 

8 REA0(5.9)N,pFLAG«CFLAG»TFLAG 

9 F0RMAT(I3,2x.Il»2X»Il»2X»IU 
WR I TE ( 6, 20 )N» PFLAG, CFLAG. TFLAG 

20 F0RMAT(/.2X,"N=". 13, 5X, "PFLAG «", 13, 5X, "CFLAG a", I3,5X,"TFLAG=", 13 
140 !,/) 

*RITE<6,49) 
49 FORMAT (2X,"n IS THE NUMBER OF TIME STEPS IN THE USER SUPPLIED STORM 
|M") 
WRITE (f>, 44) 
145 44 FORMAT (2X,"lF PFLAG=0, INPUT RAIN IS IN IN/HR",/, 

!2X,"IF PFLAG=1, INPUT RAIN IS IN INCHES",/,/, 
|2X,"IF CFLAG=0, USER TIME DISTRIBUTION IS UTILIZED AS IS",/, 
|2X,"IF CFLAG=1, CORPS OF ENGINEERS BALANCED HYETOGRAPH IS FORMED F 
|ROM INPUT RAINFALL",/) 
150 WRITE16.53) 

53 F0RMAT(2X,"iF TFLAG = 0, INPUT TIME IS IN MINUTES",/, 
|2X,"IF TFLAG = 1« INPUT TIME IS IN HOURS",/) 
REA0C5.34) <t<I> ,I=1,N) 
34 FORMAT (10F6.1) 
155 REA0(5.10) (R(I) ,I=1,N) 

10 FORMATI10F6.3) 

IF(CFLAG.EQ.O)GO TO 48 
CALL BALANCE 
48 CONTINUE 
160 IFITFLAG.EQ.DGO TO 52 

XSITE(6,21) 

21 F0RMAT(2X,"TlME STEPS, MINUTES") 
*RITE<6,37> (T(I) ,1=1, N) 

37 FORMAT <lX,2oF6.1»/»20F6.1,/, I 0F6.1,/) 
165 32 FORMAT(lX,2nF6.3,/,lX,20F6.3»/,lX,10F6.3,/) 

C 

C CONVERT TIME STEPS FROM MINUTES TO HOURS 
C 

DO 35 1=1, N 
170 35 T(I)=T(I)/6o. 

52 *RITE(6,36) 



147 



Exhibit Al. (continued). 



PROGRAM XSRMH 73/73 OPT-o TRACE 



36 FORMAT (2X. "TIME STEPS. HOURS") 
WRITEJ6.32) (T(I). WtN) 
0ELT«T(1) 
175 IF(PFLAG.EQ.0)GO TO 45 

WRITE<6,46) 

46 FORMAT<2X, "RAINFALL DEPTH INCREMENTS") 
WRITE(6,32) (R(I) tlsltN) 

C 
180 C CONVERT DEPTHS TO INTENSITIES 

C 

00 47 Ial.N 

47 R(I)3R(I)/0cLT 
45 WRITEI6.23) 

185 23 F0RMAT(2X. "RAINFALL INTENSITIES. IN/HR") 

WRITEC6.32) (R(I) .I»1.N) 
C COMPUTE CUMULATIVE STEP PRECIP.CUMP 

00 24 I«1.N 

IP(I.EQ.l)6o TO 25 
190 CUMP ( I ) =CUMp < 1-1 ) *R < I ) • < T ( I ) -T < 1-1 > > 

60 TO 24 
25 CUMP(I)=R(I)«T(I> 
24 CONTINUE 

WRITEI6.26) 
195 26 FORMAT (2X. "STEPS OF CUMULATIVE PRECIPE) 

WRITE (6,32) (CUMP (I). 1=1. N) 

IF(0PTI0N.E0.3)60 TO U 

IF(0PTI0N.E0.4)SF»SFFC 

IF(0PTI0N.Eo.4)G0 TO 12 
200 5 CALL HUFF 

IF(OPTION.Eo.l)SF*SFFC 

IF(OPTION.EQ.l)GO TO 12 

11 CALL DEFICIT 

12 CALL UH 
205 CALL PONTIM 

/ CALL PPINF 

IF(SUB0PT1.e0.1)60 TO 30 
CALL CONSTR 
CALL SCS 
210 30 WRITE(6,33) 

33 FORMAT(/.10o<lH»>./) 
STOP 
ENO 



148 



Exhibit Al. (continued) 



SUBROUTINE HUFF 



73/73 OPT=0 TRACE 



FTN 4.8*508 



10 



15 



20 



25 



30 



35 



40 



45 



50 



55 



SUBROUTINE HUFF 

COMMON/A/DElT.Q.N.P.TD.CN 

C0MM0N/D/T(i 00J.RU 00). RE (100) 

COMMON/G/CUMP(100) .OPTION 

COMMON/H/ARpA.L.Y.NN.NF 

INTEGER OPTION 

INTEGER Q 

DIMENSION Pp(10) .PT(10> 

THIS SUBROUTINE IMPOSES A HUFF TIME DISTRIBUTION ONi AN EVENT 
OF SPECIFIED OEPTH AND DURATION 

WRITEJ6.33) 
33 FORMAT(/.10o<lH») ./) 

WRITE<6,28> 
26 FORMAT(/.10x«»OUTPUT OF SUBROUTINE HUFF"./) 

DELT=DELT/6o. 

COMPUTE TEN PERCENT TIME STEPS 

PT(1)=0.1»TD 
DO 15 1=2. lo 
15 PT(I)=PT(I-l)*(0.1»TD) 
IF(Q.GT.l)Go TO 50 

COMPUTE FIR5T QuARTILE STEPS OF PRECIP FOR TEN PERCENT TIME STEPS 

PP(1)=0.17»P 

PP<2)=0.48»P 

PP(3)=0.71»P 

PP(4)=0.80»p 

PP(5)=0.86»P 

PP(6)=0.91»p 

PP(7)=0.94»p 

PP(8)=0.96»p 

PP(9)=0.98»P 

PP(10)=P 

GO TO 53 

50 IF(Q.GT.2)Go TO 51 

COMPUTE SECOND QUARTILE STEPS OF PRECIP FOR TEN PERCENT TIME STEPS 

PP(1)=0.03»P 

PP(2)=0,13»p 

PP(3)»0.31»p 

PP(4)a0.53»P 

PP(5)=0.72»P 

PP(6)»0.87*p 

PP(7)=0.93»P 

PP(8)=0.96«P 

PP(9)=0.98»p 

PP(10) =P 

GO TO 53 

51 IF(Q.GT.3)G0 TO 52 

COMPUTE THIpD QUARTILE STEPS OF PRECIP FOR TEN PERCENT TIME STEPS 



149 



Exhibit Al. (continued) 



SUBROUTINE HUFF 73/73 OPT = TRACE FTN 4.8*508 

PP(l)=0.03»p 

PP(2)=0.10»P 
60 PP(3)=0.14»p 

PP(4)=0.17»P 

PP(5)=0.28»p 

PP(6)=0.54»p 

PP<7)=0,78»p 
65 PP(8)=0.93»P 

PP(9)=0.98»p 

PPU0)*P 

GO TO 53 
C 
70 C COMPUTE FOURTH QUARTILE STEPS OF PRECIP FOR TEM PERCENT TIME S.TEPS 

C 

52 PP<1)»0.03»P 
PP(2)»0.06*p 
PP(3)=0.10»p 

75 PP(4>=0.14»p 

PP(5)a0.18»p 
PP(6)=0.25»P 
PP(7)«0.35»P 
PP(8)s0.54«P 
80 PP(9)=0.92*p 

PP(10)=P 
C 

C COMPUTE NUMrEr OF TIME STEPS DICTATED. BY USER CHOICE OF. TIME 
C INTERVAL LENGTH 
85 C 

53 N=INT(TD/DElT) 
XN=TD/DELT 
IF(XN.GT.FL0AT(N))NaN»l 

C 
90 C IN LOOP lOt INTERPOLATE CUMULATIVE DEPTHS FOR USER TIME STEPS 

C FROM CUMULATIVE DEPTHS FOR TEN PERCENT TIME' STEPS 
C / 

DO 10 1=1, N 
IFU.EQ.NIGo TO 25 
95 IFd.GT.DGo TO 20 

T(I)=DELT 
GO TO 21 

20 T(I)»T(I-1)*DELT 

21 IFLAG=1 

100 DO 11 J=l,lo 

IFtT(I) ,LE.pT(J))GO TO 11 
IFLAG=IFLAG«1 

11 CONTINUE 
IF(IFLAG.GT.l)GO TO 12 

105 CUMP(I)=<T(I>/PT(1)>»PP<1> 

GO TO 10 

12 CUMP(I)=(((T(I)-PT(IFLAG-1))/(0.1*TO))»(PP(IFLAG)-PP(IFLAG-1) 
1>)*PP(IFLAG-1) 

GO TO 10 
110 25 CUMP(N)=P 

T(N)»TD. 
10 CONTINUE 
C 
C IN LOOP 30, COMPUTE MEAN RAINFALL INTENSITIES FOR EACH USER 



150 



Exhibit Al. (continued). 



115 C TIME STEP 

c 

00 30 IaliN 
IFU.EQ.NIGo TO 26 
IFU.GT.llGO T031 
120 R(I)=CUMP(I)/OELT 

GO TO 30 
31 R < I ) » ( CUMP ( i ) -CUHP ( I - 1 ) ) /CELT 
GO TO 30 

26 R(N)=(P-CUMp(i-l))/(TD-T(I-l)) 
125 30 CONTINUE 

WRITE(6,27) 

27 FORMAT (lOXtiiHuFF HYETOGRAPH",/. 10X. 15 ( 1H») t/) 
WRITE(6,22) 

22 FORMAT (2Xi»TlME <HR) », 5Xt "CUMULATI VE PRECIP UN)''»5X» 
130 !»RAINFALL INTENSITY < IN/HR) ",/> 

WRITE <6t 23) (T(I)tCUHP(I) tR(I) tl'ltN) 

23 FORMAT(lX,Fl0.3,12X,F10.3t20XtF10.3) 
RETURN 

END 



151 



Exhibit Al. (continued) 



SUBROUTINE DEFICIT 73/73 OPT=»0 TRACE FTN *.B*508 

1 SUBROUTINE DEFICIT 

COMMON/ A/DElT.Q,N,P,TD»CN 
COMMON/C/MO.OaY.SFFC.S 
C0MM0N/E/AR<5) 
5 COMMON/F/SF 

REAL JOATEtiA 
INTEGER MO. DAY 
C 

C THIS SUBROUTINE MODIFIES THE STORAGE SUCTION FACTOR* DUE TO 
10 C CHANGE IN M IsTuRE DEFICIT DUE TO SEASONALITY AND ANTECEDENT RAIN 

C 

WRITE(6,33) 
33 FORMAT(/«10o(lH»)./> 
WRITE(6,15) 
15 15 FORMAT!/. 10x»"OuTPUT OF SUBROUTINE DEFICIT"./) 

C 

C COMPUTE S FoR AMC II 
C 

S=(1000./CN)-10. 
20 wRITE(6,12>S 

12 FORMAT (2X,»s*»»Fl0.3»2X, "IN") 
C 

C COMPUTE MOISTURE AT FIELD CAPACITY 
C 
25 DFC=0.253-(.002»CN) 

C 

C COMPUTE EFFECTIVE DEPTH OF SOIL PROFILE 
C 

DEPTH=S/DFC 
30 C 

C COMPUTE WETTING FRONT SUCTION (EFFECTIVE CAPILLARY DRIVE) 
C 

HF=SFFC/DFC 
C 
35 C COMPUTE JULIAN DATE 

C / 

JDATE" ( 30. "FLOAT (M0-1))*FL0AT( DAY) 
C 

C COMPUTE SEASONAL S BY SINUSOIDAL APPROXIMATION 
40 C 

SB=((SIN( ( (jDATE-5.* 180. )/360.)»2.»3. 1*16) ♦l.)/2.)»1.3»S 
1*(0.2»S) 
WRITE(6.13)oEPTH.HF.JDATE.SB 

13 F0RMATI2X, ''EFFECTIVE DEPTH=", F 1 0.2. 2X, "IN". 3X, 

45 ("WETTING FR NT SUCT ION.HF, =",F 1 .3. 2X. "IN". 3X , "JULI AN DATE »". 

IF5.0.3X, "SEASONAL S =".F10.3. 2X, "IN") 
SA = S8 
IA=0.2»S 
C 
50 C IN LOOP 10. MODIFY SEASONAL S (SB) ACCORDING TO 5 DAY ANTECEDENT 

C CONDITION TO OBTAIN ADJUSTED S ISA) 

C SA INCREASES DUE TO DRYING BY A FACTOR 1.06 PER DAY. SA DECREASES 
C BY THE INFILTRATED DEPTH (AR(I)-AQ). APPROXIMATED ON EACH 
C RAIN DAT BY ThE SCS METHOD (AMC II) 
55 C 

DO 10 1=1.5 
IF(AR(I).EQ. 0.0)60 TO 11 

IF(AR(I) .LE.UJGO TO 16 
AO=( (AR(I)-0.2»S)**2)/(AR(I)»0.8»S) 
60 SA=(1.06*SA)-(AR(I)-A0) 

GO TO 10 
16 SA3(1.06«SA)-AR(D 

GO TO 10 
11 SA=1.06«SA 
65 10 CONTINUE 

IF(SA.LE.O.o)SA»0.05 
SMAX»2.«S 

IF(SA.GT.SMaX)SA=SMAX 
DA=SA/OEPTH 
70 SF=HF«DA 

WRITE(6,U)0A,SF 
1* F0RMAT(2X, "ADJUSTED DEFIC I T = ".F1 . 3. 5X . "STORAGE SUCTION FACTOR 
!.SF,=",F10.3.2X,"IN") 
RETURN 
75 END 



152 



Exhibit Al. (continued). 



SUBROUTINE PONTIM 73/73 OPT=0 TRACE FTN 4.8*506 

1 SUBROUTINE PONTIM 

COMMON/ A/DElT,Q,N, P. TD.CN 
COMMON/B/KT.TP.RP.WP.K 
COMMON/D/T<100> .R(100) iRE(lOO) 
5 COMMON/F/SF 

OIMENSION Pt(IOO) 
REAL KT 
C 
C THIS SUBROUTINE CALCULATES PONDING TIME' FOR A VARIABLE- RAINFALU 

io c intensity event 
c 

WRITE<6,33> 
33 FORMAT!/. 10o<lH»>./) 
WRITEI6.27) 
15 27 FORMAT(/tlOx»»OUTPUT OF SUBROUTINE PONTIM"./) 

1 = 
C 

C I IS THE COUNTER INDICATING THE TIME STEP OF CONSIDERATION 
C 
20 10 1=1*1 

IFlI.GT.NJGo TO 18 
C 

C TEST RAINFALL INTENSITY W.R.T. HYDRAULIC CONDUCTIVITY 
C 
25 IF(R<I).LE.KT)GO TO 10 

IFU.EQ.llGo TO 11 
11=1-1 
SUMP=0. 

c 

30 C IN LOOP 12i SUM UP PRECIP FALLING IN ALL TIME' STEPS PREVIOUS 

C TO STEP OF CONSIDERATION - 
C 

00 12 Jsl.Ii 
IFU.EQ.llGo TO i* 
35 SUMP=SUMP*R{J)«(T(U»-T(J-1) ) 

GO TO 12 

14 SUMP=SUMP»r(j)»T(J) 

12 CONTINUE 
PT(I>=T(I-1)*(1./R(I))»((SF/((R(I)/KT)-1.))-SUMP) 

40 C 

C TEST COMPUTED PONDING TIME AGAINST TIME^ AT END OF PREVIOUS STEP 
C 

IF(PT(I)-T(I-1J)13. 13.17 

13 TP=T(I-1) 
45 RP=R(I) 

GO TO 23 
C 

C TEST COMPUTED PONDING TIME AGAINST TIME' STEP OF CONSIDERATION 
C 
50 17 IF(PT(I)-T<i) ) 15.15.10 

11 PT(I)=(1./R(I))»(SF/((R(I)/KT)-1.)) 
IF(PT(I).GT.T(I))GO TO 10 

15 TP=PT(I) 
RP=R(I) 

55 23 K«=0 

WP=0.0 



153 



Exhibit Al. (continued) 



SUBROUTINE PONTIM 73/73 OPT«0 TRACE FTN 4.8*508 

C LOOP 20 COMPUTES CUMULATIVE INFILTRATION OCCURRING IV *HOLE 
C TIME STEPS PREVIOUS TO PONDING 
60 C 

00 20 JsltN 
IF(T(J) ,GT.tP)GO TO 20 
IF(J.E0.1)Go TO 21 
WPa«P*R(J)»(T<J)-T(J-l)> 
65 GO TO 22 

21 WP=WP»R(J)«T(J) 

22 K«K*1 

20 CONTINUE 
C 
70 C NEXT FOUR STATEMENTS TAKE CARE OF FILING TOTAL' INFILTRATION 

C OCCURRING Up THROUGH PONDING TIME 
C 

IF<K.EQ.O)Go TO 25 
KPsWP4RP»<Tp-T(K)) 
75 GO TO 26 

25 *PaRP»TP 

26 WRITE<6,24)tP,RP»WP 

2* FORMAT (2X, "PONDING TIM£s",F8.3. IX , "HRM, 5X, "PONOING RAINFA|_L*"tF8.3 
ltlXt"IN/HR",5Xt"DEPTH OF RAIN INFILTRATED PREVIOUS TO P0NDINGa",F8 
80 t.3tlX,»IN"> 

C 

C K IS THE INoEx OF THE LAST FULL TIME STEP BEFORE PONDING 
C (IT IS PASSED TO SUBROUTINE PPINF) 
C 
85 IF(K.GT.O)Go TO 28 

GO TO 16 

28 WRITE(6,29)K«T(K) 

29 F0RMAT(2X.»lAST FULL TIME STEP T <".I2t") »«tF8.3) 
GO TO 16 

90 18 WRITEI6.19) 

\f FORMAT (2Xt»p0N0lNG NEVER OCCURS") 
16 RETURN 
END 



154 



Exhibit Al. (continued). 



SUBROUTINE PPINF 73/73 OPT«0 TRACE FTN *. 8*508 

1 SUBROUTINE pPjNF 

COMMON/ A/DEL T.Q.N, p. TO. CN 
COMMON/B/KT.TP.RP.WP.K 
COMMON/F/SF 
5 COMMON/D/T(i00) tR(lOO) »RE(10O) 

COMMON/H/ARfA.L.Y.NN.NF 
C0MMON/J/DElP(150) ,QA<150) .TMU50) 
01 MENS ION W(l00)»OELW(l00).IR(100),RER(100) 
REAL IR 
10 REAL KT 

C 

C THIS SUBROUTINE COMPUTES P0ST-P0N0IN3 INFILTRATION FOR A 
C VARIABLE INTENSITY RAINFALL EVENT 
C 
15 WRITE(6,33) 

33 FORMAT!/. IOoUHO ./) 

WRITE(6,21) 
21 FORMAT!/. 10x»"OUTPUT OF SUBROUTINE PP'INF, VARIABLE RAINFALL. IMFIL 
ITRATION APPROACH"./) 
20 C 

C COMPUTE RAInFaLL SORPTIVITY 
C 

RSORP=SQRT(?.«KT # <(SF**P)»*2>/SF) 
C 
25 C COMPUTE NORMALIZED PONOING RAINFALL INTENSITY 

C 

RSTARP=RP/Kt 

c 

C COMPUTE "8" TERM 
30 C 

B=0.5»((SF*wP)«»2)/(KT»SF«((RSTARP-l.)»»2)) 
C 
C K IS THE INoEx OF THE LAST FULL TIME STEP BEFORE PONDING, 

c (Passed from subroutine pontimj. m is then the inde< of; the 

35 C FIRST FULL TIME STEP AFTER PONDING 

C 

M = K*1 
C 

C IN LOOP 10. COMPUTE STEPS OF CUMULATIVE' INFILTRATION <W) , INCREMENTAL 
*0 C INFILTRaTIOn(DELW) .MEAN INFILTRATION RATEURl.AND MEAN EXCESS 

C RAINFALL RAtE(RE> 
C 

DO 10 I=M,N 

W(I)=wP»RSOrP»(SQRT(T(I)-TP»B)-SQRT(3))*KT»(T(I)-TP) 
*5 IF(I.EO.M)Go TO 11 

OELW(I)=W(I)-w(I-l> 
IR(I)=DELW(I)/(T<I)-Ttl-D) 
GO TO 12 

11 DELW(I)sW(l)-wP 

50 I«(I)=DELW(i)/(T(l)-TP) 

12 CONTINUE 
IF(R(I)-IH(i))l3, 13.14 

13 IR(I)=R(I) 
RE(I)=0.0 

55 IF(I.EO.M)Go TO 15 

DELW(I)=R(I)»(T(I)-T(I-1)> 
W(I)=W(I-1)»DELW(I) 



155 



Exhibit Al. (continued). 



GO TO 10 

15 OELW<I)=R<I)«(T(I)-TP) 
60 W(I)=W(I-1)»DELW(I) 

60 TO 10 
14 RE(I)=R(I)-iR(IJ 
10 CONTINUE 
C 
65 C SUBTRACT RETENTION (0.1 IN) FROM EXCESS RAINFALL PATTERN 

C 

RET=0.1 
00 27 I=M,N 
IF(l.EO.M)Go TO 23 
70 PS=RE(I)«(T<I)-T<I-1>) 

IF(RET-PS)26»25,25 
26 RER(I)*(PS-rET)/(T(I)-T(I-1>) 
RET=0.0 
00 TO 27 
75 23 PS=REU)»(T(I)-TP) 

IF(RET-PS)24»25,25 
24 RER(I)«(PS-rET)/(T(I)-TP) 
RET=0.0 
60 TO 27 
bO 25 RERU>=0.0 

RET=RET-PS 
-27 CONTINUE 
C 

C DEFINE OELP ARRAY OF INCREMENTS OF EXCESS RAIN (IN) 
85 C 

IFLAOrO 
00 28 I=m,n 

IF(RER(I) .Eo. 0.0. AND. IFLA6.EQ. 0)60 TO 28 
IFLAG=1FLAG»1 
90 IF(I.EQ.M)6o TO 29 

DELP(IFLAG)=RER(I)*DELT 
TM(IFLA6)=T(I) 
60 TO 28 
29 0ELP(IF L A6) 3 RER(I)»(T(I)-TP) 
95 TM(IFLA3)=T(I) 

28 CONTINUE 
NF=IFLAG 
*RITE<6,9> 
9 F0RMAT(5X,"T(HR) = TIME IN HOURS"./. 
100 |5X,»W(IN) = CUMULATIVE INFILTRATION IN INCHES"./. 

!5X,"DELW<IN) a INCREMENTAL INFILTRATION IN INCHES"./. 
!5X."IR(IN/Hr) a INFILTRATION RATE IN INCHES PER HOJR"./t 
|5X,"R(IN/HR) s RAINFALL RATE IN INCHES PER HOUR"./. 
|5X,"RE(IN/Hr) a RAINFALL RATE AFTER INFILTRATION S J8TRACTED". /. 
105 |5X."HER(IN/h«) » NET EXCESS RAINFALL RATE AFTER RETENTION SUBTRACT 

!E0"./> 
WRITEI6.17) 
17 F0RMAT(5X,"T(HR)".6X."W(lN)".3X."DELi<(IN)".lX,"IR(IN/HR)",2X,"R(lN/HR)»;5x."RE(lN/HR 
1/HR)".2X."RE<IN/'HR)»,2X."RER(IN/HR)"./J 
110 WRITE(6,18)TP.WP.WP 

16 F0RMATI1X.3F10.3) 
DO 16 IbM.N 
MRITE(6,19)T<I).W(I).DELM(I).IR(I).R(I).RE(I).RER(I) 

19 FORMAT(1X.7f10.3) 
115 16 CONTINUE 

C 

C CHECK MASS RALANCE 

C 

WRITEI6.7) 
120 7 FORMAT*/. 2X, "MASS BALANCE CHECK",/) 

PE = 0. 

IF(NF.EO.0)GO TO 6 
DO 8 1=1, NF v 
8 P£=PE*OELP<i) 
125 6 RET=0.1-RET 

WRITE(6,20)pE,H(N) ,RET,P 

20 F0RMATI2X, "EXCESS PRECIP=", F8.3.2X, "IN", /. 

I 2X, "CUMULATIVE INF ILTRAT ION«", F8. 3.2X. "I N"»/, 
!2X,"RETENTIoN=",F8.3,2X,"IN",/, 
130 I2X, "TOTAL PrEc I P=".FB. 3, 2X, "IN") 

IF(NF.EO.0)gO TO 5 
CALL ROUTE 
60 TO 3 
5 WRITE<6,4) 
135 4 FORMAT (/,5X, "ALL RAINFALL INFILTRATES - NO RUNOFF IS PRODUCED",/) 

3 RETURN 
END 

156 



Exhibit Al. (continued). 



ioor<uui i*c const* fj/li OPT»0 TRACE FTN *.B*508 

1 SUBROUTINE cONSTR 

COMMON/ a/DElT,Q,N,P,TD.CN 
COMMON/B/KT.Tp.RP.WP.K 
COMMON/D/T(l00)»R(100) tRE(lOO) 
5 COMMON/F/SF 

COMMON/H/AREA,L»yfNN.NF 
COMMON/J/DE|_P<150) .QAU50) .TMU50) 
01 MENS I ON W(loO) (DELW(IOO) .13(100) .RERtlOO) 
REAL KT.IR 
10 C 

C THIS SUBROUTINE COMPUTES EXCESS RAINFALL BY INFILTRATION EQUATION 

C FOR A CONSTANT INTENSITY EVENT 

C 

*RITE(6,33> 
15 33 FORMAT(/»10o<lH»> »/> 

*RITE<6,21> 
21 FORMAT*/. 10x. "OUTPUT OF SUBROUTINE CONSTR. CONSTANT RAINFALL Br IN 
IFILTRATION APPROACH"./) 
C 
20 C COMPUTE CONSTANT RAINFALL RATE FROM DEPTH AND DURATION 

C 

CR=P/TO 
C 
C COMPUTE SORpTlVlTY 



25 C 

SORP3SQRT<2.»KT»SF) 
C 

C COMPUTE NORMALIZED RAINFALL RATE 
C 
30 RSTAR=CR/KT 

IF(RSTAR.LE.l.)GO TO <► 
C 

C COMPUTE MEIN ANO LARSON PONDING TIME 
C 
35 TP=SF/(CR«(RSTAR-1.)) 

IF(TP.GE.TO)GO TO <► 

KK = 
C 
C LOOP 22 FINOS INDEX. KK. OF LAST FULL! TIME STEP BEFORE PONDING 

♦ C 

DO 22 1=1. N 
IF(T(I).GE.TP)GO TO 22 
KK=KK»1 
22 CONTINUE 

♦ 5 C 

C CALCULATE RaTIO. A CONVENIENCE TERM 
C 

RATIO=RSTAR/(RSTAR-l.) 
C 
50 C CALCULATE OpPTH INFILTRATED UP TO PONDING TIME, WP 

C 

WP=CR«TP 

B=0.5»TP«(RaTIO»°3) 
C 
55 C M IS THE INoEx OF THE FIRST FULL TIMEi STEP AFTER PONDING 



C 



M=KK*1 



157 



Exhibit Al. (continued) 



SUBROUTINE CONSTR 73/73 OPT=0 TRACE FTN *. 8*508 

C 

C LOOP 20 FINoS STEPS OF CUMULATIVE INFILTRATION (W) , INCREMENTAL 
60 C INFILTRaTIOn(OELW) t MEAN INFILTRATION RATE ( IR) t ANO MEAN EXCESS 

C RAINFALL RAtE(RE) 
C 

00 20 I=M,N 

»MI)=WP*SORp»RATlOMSQRT<T<I>-TP*B)-SQRT<B)>*KT»(T<I)-TP) 
65 IF(I.EO.M)Go TO 11 

DELW<I)eW(I)-WU-l) 

IR(I)«DELW(i)/(T(I)-T(I-l)) 

00 TO 12 

11 OELW(I)=W(I)-WP 

70 IR(I)»OELW(i)/(T(I)-TP) 

12 CONTINUE 
IF(CR-IR(I))13.13»14 

13 IR<I)=CR 
RE(I)»0.0 

75 lF(I.EO.M)Go TO 15 

DELW(I)=CR*(T(I)-T(I-1>> 

W(I)=W(I-1)«DELW(I) 

GO TO 20 
15 OELW(I)=CR«(T(I)-TP) 
80 W(I)=W(I-1)«DELW(I) 

GO TO 20 

14 RE(I)=CR-IR(I) 
20 CONTINUE 

C SUBTRACT RETENTION (0.1 IN) FROM EXCESS RAINFALL PATTERN 
85 C 

RET=0.1 

DO 27 I=M,N 

IFU.EQ.MlGo TO 23 

PS=RE(I)*(T(I)-T(I-1>) 
90 IF(RET-PS)26»25 f 25 

26 RER(I)=(PS-RET)/(T(I)-T(I-1)) 
RET=0.0 

GO TO 27 

23 PS"RE(I)<MT(I)-TP> 
95 IF(RET-PS)24»25t25 

24 RER(I)=(PS-rET)/(T(I)-TP) 
RET=0.0 

GO TO 27 

25 RER(I)=0.0 
100 RET=RET-PS 

27 CONTINUE 
C 

C DEFINE DELP ARRAY OF INCREMENTS OF EXCESS RAIN DEPTH(IN) 
C 
105 5 IFLAG=0 

DO 28 I=M,N 

IF(RERtl) .EQ.O.0.AND.IFLAG.EQ.O)GO TO' 28 
IFLAG=IFLAG*1 
IF(I.EO.M)Go TO 29 
110 DELP(IFLAG)rRER(I)*DELT 

TM(IFLAG)»T(I) 
GO TO 28 
29 DELP(IFlAG)=RER(I)*(T(I)-TP) 
TM(IFLAG)»T(I) 



158 



Exhibit Al. (continued). 



SUBROUTINE CONST" 73/73 OPT*0 TRACE FTN *. 8*508 

115 28 CONTINUE 

NF = IF|_AG 
WRITE<6,17) 

17 F0RMAT<5X,"T<HR)"»6X»"W<IN>",3X,»0ELrf<IN)",lX,"IR(IN/HR)",2X,"R<IN/HR>»;5X»"RE<lN/rHR 
|/HR)",2X,"Re<IN/HR)",2X,"RER<IN/HR)",/) 

120 WRITE(&,18)tP.WP,WP 

18 FORMAT<1X,3f10.3> 
DO 16 I=MtN 

WR I TE 1 6 , 1 9 ) t ( I ) . W ( I ) » DEL N ( I ) , I R ( I ) , C S". RE < I ) t RER < I ) 

19 FORMAT<lX,7Fl0.3> 
125 16 CONTINUE 

C 

C CHECK MASS RALANCE 

C 

WRITE<6,7> 
130 7 FORMAT </,2X, "MASS BALANCE CHECK",/) 

PECONS=0. 

IF(NF.£Q.0>gO TO 6 
00 8 1=1. NF 
8 PECONS=PECOnS»DELP(I) 
135 6 RET=0.1-RET 

WRITE(6,10)pEC0NS.W(N) .RET.P 
10 FORMAT (2X, "EXCESS PRECIP=".F8.3,2X, "IN",/, 
|2X, "CUMULATIVE I NFILTRAT ION = ", FB. 3, 2X , "I N",/, 
|2X,"RETENTIoN=»,F8.3,2X,»IN",/, 
1*0 |2X, "TOTAL PrEcIP=",F8.3,2X,"IN") 

IF(NF.EQ.O)60 TO 4 
CALL ROUTE 
GO TO 2 
* WRITE(6,3) 
I* 5 3 F0RMAT</,5X,"ALL RAINFALL INFILTRATES - NO RUNOFF IS PRODUCED",/) 

2 RETURN 
ENO 



159 



Exhibit Al. (continued). 



SUBROUTINE SCS 73/73 OPT = TRACE FTN 4.8*508 

1 SUBROUTINE SCS 

COMMON/A/DElT,Q,N,P,TD.CN 
COMMON/C/MO.DAY.SFFC.S 
COMMON/D/T<iOo),R<100)»RE(100> 
5 C0MM0N/£/AR(5) 

COMMON/G/CUmP<100> .OPTION 
COMMON/H/AREA.L.Y.NN.NF 
COMMON/J/DElP{150),QA<150>.TM<.150) 
DIMENSION W(loO)tOELW(100)tIR(100) 
10 REAL IA.IR 

INTE6ER OPTION 
C 

C THIS SUBROUTINE COMPUTES EXCESS RAINFALL BY THE STANDARD SCS 
C METHOD FOR VARIABLE RAINFALL! AND FOR CONSTANT RAINFALL' 
15 C 

WRITE(6,35) 
35 FORMATC/.lOoUH*)./) 

WRITEI6.21) 
21 FORMAT (/tlOx»"OUTPUT OF SUBROUTINE SCS"»/) 
20 C 

C IF OPTION Is t OR 4. CN FOR AMC II IS JSEO 
C 

IF(OPTION.EQ.1.0R.DPTI0N.EQ.4)G0 TO 12 
AMC=0.0 
25 C 

C LOOP 10 ADDS UP 5 DAY ANTECEDENT RAI^FALU 
C 

DO 10 I»1.5 
10 AMC*AMC*AR<l> 
30 C 

C TEST FOR SEASON BY MONTH IN WHICH EVENT OCCURS 
C 

IF<M0.GT.4.aND.M0.LT.10)G0 TO 11 
C / 
35 C APPLY SOBHANl EQUATIONS TO MODIFY CN IF. AMC CRITERIA DICTATE 

C 

IF{AMC.LT.0.5)CN»CN/(2.334-0.01334»CN) 
IF < AMC. 6T.l.l)CN=CN/< 0.4036*0. 0059»C"i> 
GO TO 12 
40 11 IF(AMC.LT.1.4)CN»CN/(2. 334-0. 0133*»CN) 

IF(AMC.GT.2.1)CN»CN/(0.4036*0.0059»C'W 
12 CONTINUE 
C 

C- IFLAG IS ZERO FOR THE CASE OF VARIABLE RAIN, O^E FOR CONSTANT RAIN 
45 C 

IFLAo^O 

S=(1000./CNj-lO. 
IAs0.2»S 

WRITE(6,1)Cn»S.IA 
50 1 F0RMAT<2X,"eN*»,F8.1,3X,»S«".F8.3.3X."lA«".F8.3> 

WRITEI6.2) 
2 FORMAT (/,2X, "VARIABLE RAINFALL CASEf SCS METHOD"./) 
C 

C LOOP 16 COMPUTES CUMULATIVE INFILTRATI ON (W) , INCREMENTAL' 
55 C INFILTRATION(OELW). MEAN INFILTRATION RATE< IRJ .AND MEAN EXCESS 

C RAINFALL RATE(RE) 
C 



160 



Exhibit Al. (continued). 



34 DO 16 1=1, N 

IF(CUMP(I).lE.U>60 TO 14 
60 tf <I)=CUMP(I)-< ( (CUMP(I)-IA)»»2)/(CUM?i(I)*0.8»S)> 

IFU.EQ.llGo TO 15 

DELW(I)sW(I)-w(I-l) 

IR(I)=DELW(i)/(T(I)-T(I-l)) 

IF(R(I) ,GT.iR(I))-GO TO 6 
65 RE(I)=0.0 

GO TO 16 

6 RE(I)=R(I)-iR(I) 
GO TO 16 

15 0ELW(I)=W(I) 
70 IR(I)=DELW(I)/T(I) 

IF(R(I) ,GT.lR(I))G0 TO 7 

RE(I)=0.0 

GO TO 16 

7 RE(I)=R(I)-lR(I) 
75 GO TO 16 

14 W(I)=CUMP(I) 

IFII.EQ.DGo TO 5 
DELW(I)=W(I)-w(I-l) 
IRU)*R(I) 
SO RE<I>=0.0 

GO TO 16 
5 DElW(I)=W(I) 
IR(I)=R(I) 
RE(I)=0.0 
85 16 CONTINUE 

C 

C DEFINE DELP ARRAY OF INCREMENTS OF, EXCESS RAIN DEPTH(IN) 

C ANO TM ARRAY OF TIMES AT WHICH THEY OCCUR 

C 
VO IC0UNT=0 

DO 28 1=1, N 

IF(RE(I) .EQ.O.O.ANO.ICOUNT.EQ.OJGO TO' 28 
ICOUNT=ICOUnT*1 
DELP ( I COUNT ) =RE ( I ) »DE|_T 
95 TM(ICOUNT)*T <I> 

28 CONTINUE 
NF=ICOUNT 
*RITE<6,17) 

17 FORMAT <3X,»t<hR)"»6X,»k'<IN)»,3X,"DEL<M1N>"»1X,»IR<IN/HR)", 
100 |4X,"R(IN/HR) ",5Xt"RE(IN/HR)",/) 

DO 18 1=1, N 

WRITE(6,19)T(I)tW(I) tOEL«<I) , I R ( I ) . R ( I ) , RE ( I ) 
19 FORMAT(lX,6Fl0.3) 

18 CONTINUE 

105 IF(NF.EQ.O)60 TO 36 

CALL ROUTE 
36 IFUFLAG.EQ.ljGO TO 33 

*RITE<6,31) 
31 F0RMAT(/,2X, "CONSTANT RAINFALL CASE* SCS METHOD",/) 
110 C RE-DEFINE CuMP ARRAY, CUMULAT I VE CONSTANT PRECIP IN LOOP 22 

C 
C ALSO IN LOOP 22, REDEFINE R ARRAY FO*i CONSTANT RAINFALL' CASE 



C 



CR=P/TD 



161 



Exhibit Al. (continued). 



SUBROUTINE SCS 73/73 OPTaO TRACE FTN 4.6*508 

115 00 22 I«ltN 

IF(l.EO.N)Go TO 24 

IFU.EQ.DGo TO 23 

CUMP(I)«CUMp(I-l>*(P/FLOAT(N> ) 

GO TO 22 
120 23 CUMP(I)x(P/fLOAT(N)) 

GO TO 22 
24 CUMP(I)=P 
22 R<I)=CR 

IFLAG=IFLAG«1 
125 GO TO 34 

c calculate depth of cumulative excess precip> 

33 PESCS=((P-I 4 )««2)/(P*0.8»S) 
TABS=P-PESCS 
WRITE(6,20)pESCS.TABS,P 
130 20 F0RMAT(2Xt"EXCESS PRECIP BY SCS METHOO IS".F10.3t2Xt»lN"» 

I /.2X. "TOTAL ABSTRACT I0Na»tF8.3i2X. "I M»'f 
J/i2Xt "TOTAL PREClP="tF8.3.2X.»IN») 
RETURN 
END 



162 



Exhibit Al. (continued) 



SUBROUTINE UH 73/73 OPT = TRACE FTN *.S*508 

1 SUBROUTINE UH 

COMMON/ A/OElT,Q,N.P,TD»CN 
COMMON/D/T(iOO) ,R(100)tRE(100) 
COMMON/H/ARfA.L.YtNNiNF 
5 COMMON/I/OElTa(150) 

COMMON/J/OElP<150) tQA<150> iTM(150) 
COMMON/L/LAgFLAG»TL 

DIMENSION R&TIOT(20) tRATI0Q(20) tQQT<150) 
DIMENSION MT(8) .00(150) 
10 REAL L 

DATA XT,YT.MT/"TIME(HR) »»"Q (CFS/IN) "."UNIT HYDROGRAPH 
! "/ 

WRITE(6,33) 
33 FORMAT(/.100(1H«) ./) 
IS WRITE<6,20) 

20 F0RMAT(/.2X, "OUTPUT OF SUBROUTINE UH",/) 
C 
C COMPUTE S FrOm cn 

c 

20 S=(1000./CN)-10. 

IF(LAGFLA6.fQ.l)60 TO 5 

C 

C 

C COMPUTE WATERSHED LAG TIME 
25 TLa(L»»0.8)»«(S»l.)»«0.7)/(1900.*(Y«*0.5)) 

C 

C COMPUTE TIME TO PEAK 

C 

5 TTP«(DELT/2.UTL 
30 C 

C COMPUTE UPPER LIMIT OF OELT 
C 

0»0.25»TTP 
C 
35 C CHECK THAT oELT IS NOT GREATER THAN JPPER LIMIT (D) 

C 

IF<DELT.LE.r)>GO TO 9 

*RITE(6,6)DELT.D 

6 FORMAT <2X,»uSfR TIME STEP 0F»,F7.3, 1 X, 

♦ !»HR IS GREATER THAN 0.25 TIME TO PEA<i WHICH IS",F7.3, IX, "HR»,/,2X, 

!"RESULTING hYDROGRAPH MAY BE JAGGED"?/) 
9 CONTINUE 

WRITE(6,24)tL,TTP 
2* F0RMAT(2X,"wATERSHE0 LAG TIME *".F8.3, "HR",/,2X."TIME TO PEAKa" 
45 !»FB.3,"HR") 

C 

C DEFINE SCS MASS CURVE IN DISCRETE 5 PERCENT STEPS OF MASS 
C RATIOQ CONTAINS CONTAINS VALUES FROM OIMENSIONLESS MASS CURVE 
C 
50 00 10 I=1.2o 

IFd.EO.DGo TO 11 
RATIOQ(I)«RaTIOQ(I-1)»0.05 
GO TO 10 
11 RATI0Q(I)»0.05 
55 10 CONTINUE 

RATI0T(1)».47 
RATI0T(2)«,60 



163 



Exhibit Al. (continued). 



SUBROUTINE UH 73/73 OPT«0 TRACE FTN *. 8*508 

RATI0T(3>».69 
RATI0T(4)«=.78 
60 RATI0T(5)=.fl5 

RATIOT(6)=.<?2 
RATI0T(7)=.q7 
RATI0T(8)=1.02 
RATI0T(9)=1.0fl 
65 RATI0T(10)=1.16 

RATI0T(11)»1.24 
RATI0T<12)=1.32 
RATI0T(13)=l.4l 
RATI0T(14)=i.51 
70 RATI0T(15)«1.62 

RATI0T(16)=1.75 
RATI0T(17)=1.9l 
RATIOT(18)3?.l5 
RATI0T(19)=2.60 
75 RATIOT(20)«5.00 

C 

C QQT(I) IS ThE VALUEt AT TIME It OF THE RATIO OF THE 1 
C INSTANTANEOUS CUMULATIVE FLOW OVER THE TOTAL CUMULATIVE FLOW. 
C IT IS OIMENsIONLESS 
80 C INTERPOLATE A QQT VALUE FOR EACH TIMEI STEP (UP TO 5 1 TTP) 

C USING VALUER IN RATIOQ 
NN=INT(5 , TTP/0ELT) 
XNN=5»TTP/DfLT 
IF<XNN.GT.F|_OaT(NN) )NN«NN*1 
65 C 

C ENSURE THAT THERE ARE NN TIME STEPS OF LENGTH OELT 
C 

IF(NN.LE.N)GO TO 27 
NPLUS=N*1 
90 00 28 I=NPLuS,NN 

28 T(I)=T(I-1)»0ELT 
27 CONTINUE 
C 

C INTERPOLATE QQT VALUES FOR TIME STEPS' OF USE 
95 C 

DO 12 1=1, N N 
TTTP=T(I)/TTP 
IF(TTTP.GE.s.)GO TO 15 
IFLAG=1 
100 00 13 J*l,2o 

IF(TTTP.LE.RATI0T(J))G0 TO 13 
IFLAG=IFLAG*1 

13 CONTINUE 
IF(IFLAG.GT.1)G0 TO U 

105 QQT(I) = (TTTP/RATI0T(1) ) "RATI 00(1) 

GO TO 12 

14 QQT(I>=< (TTTP-RATIOT(IFLAG-l) )/(RATIOT(IFLAG)-RATIOT(IFLAG-ll) 
|>MRATI0Q(IfLaG>-RATI0Q(IFLAG-1))*RATIDQ<IFLAG-1) 

GO TO 12 
110 15 0QT(I)=1.0 

12 CONTINUE 

c 

C CONVERT QQT RftTlO VALUES TO OIMENSIONLESS UH ORDINATES 
C 



164 



Exhibit Al . (continued). 



SUBROUTINE UH 73/73 OPT = TRACE FTN 4.8*5 

IIS 00 16 1=1, Nm 

IFU.EQ.llGo TO 25 
OELTA(I)«(QoT(I)-QQT(I-l) ) 
GO TO 16 

25 0ELTA(I>»OQT(I) 
120 16 CONTINUE 

C 

C ENSURE THAT DELTAS AOD UP TO ONE 

C 

SUMDEL=0. 
)25 00 21 1=1, Nn 

21 SUMDEL=SUMOeL*DELTA(I) 
00 23 1=1, Nn 

23 DELTA(l)rDEuTA(I)/SUMOEL 
C 
130 C COPY OlMENSrONLESS DELTAS INTO DO 

C 

DO 7 Iol,NN 
• 7 DD(I)aDELTArl) 
C 
135 C CONVERT DIMfNsiONLESS DELTAS TO CFS PER INCH 

C 

DO 26 1=1, Nn 

26 0ELTA(I)=DElTa(I)«AREA»645.3/DELT 
C 

1*0 C WRITE OUT ThE UNIT HYDROGRAPH 

C 

WRITE(6,8) 
B FORMAT(/,10x«"UNlT HYDPOGRAPH'',/,3Xt»TIME(HR)'',10X. 
("ORDINATES TN (CFS/IN) ". 10X, "DIHENSIONLESS ORDINATES"/) 
1*5 00 22 1=1, Nn 

WRITE(6,17)T(I),DELTA<I),DD(I> 
17 F0RMAT(lX,Fl0.3,16X,F10.2,25X,F10.3) 

22 CONTINUE 

CALL MAPA(5,T, DELTA, 1,NN,XMIN,XMAX,YHIM,YMAX. XT. YT.MTill 
150 RETURN 

ENO 



165 



Exhibit Al. (continued). 



SUBROUTINE ROUTE 73/73 OPT=0 TRACE FTN 4.8*508 

1 SUBROUTINE ROuTE 

COMMON/A/DElT,Q,N,P,TD.CN 
COMMON/O/T(i00) .R<10O)tREU00) 
COMMON/H/ARfA,L.Y»NN.NF 
5 C0MM0N/I/DElTa<150> 

COMMON/J/DELP(150) ,QA(1S0) .TMU50) 
DIMENSION Mt(8) 

DATA XT,YT.mT/"TIME(HR> ","Q<CFS> ", "FLOOD HYDROGRAPH 
1 "/ 

10 C 

C COMPUTE TOTaL NUMBER OF TIME STEPS FOR WHICH THERE WILU BE FLOW 

c nf is the number of steps after the onset of excess rain 
c 

MM*NN*NF-1 

is c 

C DEFINE TIME STEPS AND ZERO INFLOWS FROM STEP NF' TO MM 

NPLUS=NF»1 

DO 10 I=NPLuS,MM 

TM(I>=TM(I-i)*DELT 
20 10 DELP(I>=0.0 

C 
C DEFINE ZERO HyDROGRAPH ORDINATES (DELTAS) FROM NN TO MM 

NPLUS=NN»1 

DO 11 I=NPLtjS,MM 
25 11 DELTA(I)=0.o 

C 
C WRITE OUT DfLP.TM, AND DELTA ARRAYS 

WRITE(6,17) 

17 F0RMAT(/.1X,"DATA USED TO COMPUTE FLOOD HYDROGRAPH: »././. 
30 |2X,"T(HR) = TIME IN HOURS". /.2X, 

!"OELP(IN) = INCREMENTAL DEPTH OF EXCESS RAINFALL'S/. 
|2X,»DELTA(CfS/IN) » UNIT HYDROGRAPH ORDINATE"././ 
|2X,»T(HR)»,BX,»DELP(IN)»,5X.''DELTA(CFS/IN)"./) 
DO 16 1=1. Mm 
35 WRITE (6, 18) TM(I).DELP(I> .DELTA <I> 

18 FORMAT(1X,FB.3.2X.F10.3»8X.F10.3) 
At> CONTINUE 

C 

C COMPUTE OUTFLOWS OF THE FLOOD HYDROGRAPH 
40 DO 13 1=1. MM 

QA(I)=0.0 
DO 13 J=1.I 

QA(I)=QA(I)*DELP(J)»DELTA(I-J»1) 
13 CONTINUE 
45 C 

c print out results 

WRITE(6,19) 

19 FORMAT </,2X, "FLOOD HYDROGRAPH". /./.5X, "TIME (MR) ". 1&X."0 (CFS) "»/) 
DO 9 I =1.Mm 

50 WRITE<6,8)Tm(I).0A(I) 

8 FORMAT(2X,Fi0.3.14X.F10.2) 

9 CONTINUE 
C 

C PLOT FLOOD HYDROGRAPH 
55 CALL MAPA<5,TM.QA,1,MM.XMIN,XMAX,YMIM,YMAX»XT.YT.MT.1> 

RETURN 
END 



166 



Exhibit Al. (continued). 



SUBROUTINE TABLE 



73/73 OPT=0 TRACE 



FTN 4.8*508 



10 



IS 



20 



25 



30 



35 



40 



SUBROUTINE TABLE 

COMMON/ a/OElT,Q,N,P, TO* CN 

COMMON/B/KT.Tp.RP.WP.K 

COMMON/C/MO, DAY, SFFC. S 

C0MM0N/K/SUR0PT2 

INTEGER SUB0PT2 

REAL KT 

WRITE(6,33) 
33 FORMAT!/. 100<1H»)./) 

WRITE(6,28) 
28 FORMAT!/. 10x»"OUTPUT OF SUBROUTINE TABLE"./) 

THIS SUBROUTINE COMPUTES HYDRAULIC CONDUCT 1 VI TV. KT. AND 

STORAGE SUCTION FACTOR AT FIELD CAPACITY. SFFC. GIVEN A 

CURVE NUMBER. CN. 

USE REGRESSION EQUATIONS TO COMPUTE HYDRAULIC 
CONDUCTIVITY. KT. AND SORPTIVITY. SORP 

IFtCN.LE.75.)60 TO 11 
KT=(100.-CN)/3l5.43 
GO TO 12 

11 IF(CN.LE.36.)G0 TO 13 
KT»1.236-.0l54»CN 

GO TO 12 

13 KT=1.853-.032*»CN 

12 CONTINUE 
IF(CN.LE.65.)G0 TO 14 
SORP=(100.-cN)/42.252 
GO TO 15 

14 S0RP=1.191-.00575«CN 

15 CONTINUE 

COMPUTE STORAGE SUCTION FACTOR AT FIELO CAPACITY FROM KT AND 

SORP 

sffc=(sorp»»2)/(2.«kt) 
print out results 

WRITE(6,19)kT,SFFC 
19 FORMAT!/. 2X, "HYDRAULIC CONDUCTIVITY. KT «"» F10. 3. 2X. "I N/HR",/, 2X» 
l"STORAGE SUCTION FACTOR AT FIELD CAPACITY, SFFC »"»F10.3. IX, "IN"./ 
I> 

WRITE(6,33) 

RETURN 

END 




167 



Exhibit Al. (continued). 



SUBROUTINE BALANCE 



73/73 OPT»0 TRACE 



FTN 4. 8*508 



10 



15 



20 



25 



30 



35 



SUBROUTINE BALANCE 
COMMON/ A/DElT,Q,N,P,TDiCN 
COMHON/D/TUOO) »R < 100) »RE ( 100) 
OIMENSION Br(IOO) 
INTEGER CTR 

THIS SUBROUTINE RE-ARRANGES USER SUPPLIED INCREMENTS OF RAIN 
(DEPTH OR INTENSITY) ACCORDING TO THEl CORPS OF ENGINEERS 
"BALANCED" hYETOGRAPH. THE USER MAY INPUT THE RAIN STEPS 
IN THE R ARRAY IN ANY ORDER 

SORT ELEMENTS OF R INTO BR SO THAT BR'U) IS OF- GREATEST 
MAGNITUDE. B B <2) IS NEXT GREATEST. ETC. 

DO 40 lal.N 

CHECKsRJl) 

ICHECK=1 

DO 50 J=2.N 

IF(CHECK.GE.R(J))GO TO 50 

CHECK=R(J) 

ICHECK=J 
50 CONTINUE 

BR(I)=CHECK 

R(ICHECK)=-q9. 
♦0 CONTINUE 

ARRANGE ELEMENTS OF BR INTO A BALANCED HYETOGRAPH 

CTR=(N/2)*1 

R(CTR)=BR(1) 

DO 90 1=2. N 

IF(M0D(I.2).Eo.0)GO TO 91 

R(CTR*<I/2))=BR(I) 

GO TO 90 
91 R(CTR-(I/2)j»BR(I> 
90 CONTINUE 

RETURN 

END 




e: 
in 

\ 

in 

Qi 
3 



;T> tn 
"I 

a ox 

»- JO o 

3 — i\J 

♦ I 

<-■ 0\ J> 

OJ — Lo 

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in : Ci 



m.S. GOVERNMENT PRINTING OFFICE: 1981-0-730-115/2200 



168 



FEDERALLY COORDINATED PROGRAM (FCP) OF HIGHWAY 
RESEARCH AND DEVELOPMENT 



The Offices of Research and Development (R&D) of 
the Federal Highway Administration (FHWA) are 
responsible for a broad program of staff and contract 
research and development and a Federal-aid 
program, conducted by or through the State highway 
transportation agencies, that includes the Highway 
Planning and Research (HP&R) program and the 
National Cooperative Highway Research Program 
(NCHRP) managed by the Transportation Research 
Board. The FCP is a carefully selected group of proj- 
ects that uses research and development resources to 
obtain timely solutions to urgent national highway 
engineering problems.* 

The diagonal double stripe on the cover of this report 
represents a highway and is color-coded to identify 
the FCP category that the report falls under. A red 
stripe is used for category 1, dark blue for category 2, 
light blue for category 3, brown for category 4, gray 
for category 5, green for categories 6 and 7, and an 
orange stripe identifies category 0. 

FCP Category Descriptions 

1. Improved Highway Design and Operation 
for Safety 

Safety R&D addresses problems associated with 
the responsibilities of the FHWA under the 
Highway Safety Act and includes investigation of 
appropriate design standards, roadside hardware, 
signing, and physical and scientific data for the 
formulation of improved safety regulations. 

2. Reduction of Traffic Congestion, and 
Improved Operational Efficiency 

Traffic R&D is concerned with increasing the 
operational efficiency of existing highways by 
advancing technology, by improving designs for 
existing as well as new facilities, and by balancing 
the demand-capacity relationship through traffic 
management techniques such as bus and carpool 
preferential treatment, motorist information, and 
rerouting of traffic. 

3. Environmental Considerations in Highway 
Design, Location, Construction, and Opera- 
tion 

Environmental R&D is directed toward identify- 
ing and evaluating highway elements that affect 



* The complete seven-volume official statement of the FCP is available from 
the National Technical Information Service, Springfield, Va. 22161. Single 
copies of the introductory volume are available without charge from Program 
Analysis (HRD-3), Offices of Research and Development, Federal Highway 
Administration, Washington, D.C. 20590. 



the quality of the human environment. The goals 
are reduction of adverse highway and traffic 
impacts, and protection and enhancement of the 
environment. 

4. Improved Materials Utilization and 
Durability 

Materials R&D is concerned with expanding the 
knowledge and technology of materials properties, 
using available natural materials, improving struc- 
tural foundation materials, recycling highway 
materials, converting industrial wastes into useful 
highway products, developing extender or 
substitute materials for those in short supply, and 
developing more rapid and reliable testing 
procedures. The goals are lower highway con- 
struction costs and extended maintenance-free 
operation. 

5. Improved Design to Reduce Costs, Extend 
Life Expectancy, and Insure Structural 
Safety 

Structural R&D is concerned with furthering the 
latest technological advances in structural and 
hydraulic designs, fabrication processes, and 
construction techniques to provide safe, efficient 
highways at reasonable costs. 

6. Improved Technology for Highway 
Construction 

This category is concerned with the research, 
development, and implementation of highway 
construction technology to increase productivity, 
reduce energy consumption, conserve dwindling 
resources, and reduce costs while improving the 
quality and methods of construction. 

7. Improved Technology for Highway 
Maintenance 

This category addresses problems in preserving 
the Nation's highways and includes activities in 
physical maintenance, traffic services, manage- 
ment, and equipment. The goal is to maximize 
operational efficiency and safety to the traveling 
public while conserving resources. 

0. Other New Studies 

This category, not included in the seven-volume 
official statement of the FCP, is concerned with 
HP&R and NCHRP studies not specifically related 
to FCP projects. These studies involve R&D 
support of other FHWA program office research. 



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